WBBSE For Class 9 Life Science Chapter 3 Physiological Processes Of Life MCQS

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Chapter 3 Physiological Processes Of Life Respiration MCQs

Question 1. Who proposed that respiration is a catabolic process?

  1. Lamark
  2. Lavoisier
  3. Priestley
  4. Barnes

Answer: 2. Lavoisier.

Question 2. Energy currency of the cell is—

  1. ADP
  2. Mitochondria
  3. ATP
  4. Chloroplast

Answer: 3. ATP.

Read And Learn More WBBSE Solutions For Class 9 Life Science And Environment MCQs

Question 3. Arespiratory substrate is —

  1. Glucose
  2. Protein
  3. fats
  4. All of these

Answer: 4. All of these.

Question 4. The starting point of respiration is —

  1. Amino acid
  2. Glucose
  3. Pyruvate
  4. None

Answer: 2. Glucose.

WBBSE For Class 9 Life Science Chapter 3 Physiological Processes Of Life MCQS

Wbbse Class 9 Life Science Chapter 3 Mcq With Answers

Question 5. The site of glycolysis is —

  1. Mitochondria
  2. Cytoplasm
  3. Golgi bodies
  4. Nucleus

Answer: 2. Cytoplasm.

Question 6. The final phase of respiration is —

  1. Glycolysis
  2. Terminal respiration
  3. Krebs cycle
  4. Cytoplasm.

Answer: 2. Terminal respiration.

Question 7. The step common in both aerobic and anaerobic respirations is —

  1. Krebs cycle
  2. Terminal respiration
  3. Glycolysis
  4. Carbon assimilation

Answer: 3. Glycolysis.

Question 8. In fermentation pyruvic acid is converted into (in animals) —

  1. Lactic acid
  2. Ethanol
  3. Starch
  4. Glycogen

Answer: 1. lactic acid.

Question 9. In Krebs cycle, the first formed acid is —

  1. Acetic acid
  2. Formic acid
  3. Citric acid
  4. Carbonic acid

Answer: 3. Citric acid.

Question 10. T.C.A. cycle is also called —

  1. Glycolysis
  2. Krebs cycle
  3. Light phase
  4. Dark phase

Answer: 2. krebs cycle.

Question 11. The energy produced in aerobic respiration is —

  1. 646 kcal
  2. 686 kcal
  3. 656 kcal
  4. 486 kcal

Answer: 2. 686 kcal.

Question 12. The number of ATP produced during glycolysis is —

  1. 4 molecules
  2. 6 molecules
  3. 1 molecules
  4. 2 molecules

Answer: 4. 2 molecules.

Question 13. A bacteria having anaerobic respiration is —

  1. Clostridium
  2. Rhizobiun
  3. Azotobactor
  4. All

Answer: 4. All.

Question 14. Pneumatophores are found in —

  1. Halophytes
  2. Bryophytes
  3. Epiphytes
  4. Algael

Answer: 1. Hallophytes.

Physiological Processes Of Life Class 9 Mcq Wbbse

Question 15. The respiratory organ in dragonflies is —

  1. Gills
  2. External gills
  3. Tracheal gills
  4. Moist skin

Answer: 3. Tracheal gills.

Question 16. An example of jelly fish is —

  1. Koi
  2. Mangur
  3. Singhi
  4. All of these

Answer: 4. All of these.

Question 17. An aquatic mammal respiring with lungs is —

  1. Sea horse
  2.  Whale
  3. Shark
  4. Dolphin

Answer: 2. Whale.

Question 18. The respiratory organ of a crocodile is —

  1.  Gill
  2. Skin
  3. Lung
  4. Trachea

Answer: 3. Lung.

Question 19. Pyruvic acid is the end product of —

  1. Calvin cycle
  2. Citric acid cycle
  3. Glycolysis
  4. Photolysis

Answer: 3. Glycolysis.

Question 20. Cell organelle which participates in respiration is —

  1. Goligbodies
  2. Mitochondria
  3. Chloroplast
  4. Nucleus

Answer: 2. Mitochondria.

Question 21. The percentage of CO, in the air is —

  1. 0.05%
  2. 0.06%
  3. 0.03%
  4. 0.09%

Answer: 3. 0.03%.

Question 22. RQ of glucose is —

  1. 2
  2. Less than one
  3. 1
  4. 3

Answer: 3. 1.

Class 9 Life Science Chapter 3 Mcq Questions West Bengal Board

Question 23. The covering membrane of lung is —

  1. Pericardium
  2. Pleura
  3. Meninges
  4. Tonoplast

Answer: 2. Pleura.

Question 24. Spiracles are present in —

  1. Earthworm
  2. Cockroach
  3. Fishes
  4. Amoeba

Answer: 2. Cockroach.

Question 25. In a plant exchange of gases takes place through —

  1. Stomata
  2. Lenticel
  3. Chloroplast
  4. Both a and b

Answer: 4. Both a and b.

Question 26. An animal having respiration with mouth cavity and lungs is —

  1. Fish
  2. Crocodile
  3. Frog
  4. Eathworm

Answer: 3. Frog.

Question 27. In higher plants exchange of gases takes place through —

  1. Stomata
  2. Lenticels
  3. Pneumatophore
  4. All

Answer: 4. All.

Question 28. Which respiratory pigment is present in pond snails?

  1. Haemoglobin
  2. Haemocyanin
  3. Heparin
  4. Fibrin

Answer: 2. Haemocyanin.

Question 29. Alveoli are present in —

  1. Heart
  2. Brain
  3. Lungs
  4. Stomach

Answer: 3. lungs.

Question 30. Lactic acid is found in our body in—

  1. Lungs
  2. Skeletal muscle
  3. Cardiac muscle
  4. Smooth muscle.

Answer: 2. Skeletal muscle.

Question 31. Which one of the following organs is the main respiratory organ of a whale?

  1. Integument
  2. Lung
  3. Gill
  4. Trachea.

Answer: Lung is the main respiratory organ of the whale.

Question 32. The cell organelle which participates in respiration is —

  1. Golgi bodies
  2. Mitochondria
  3. Nucleus
  4. Chloroplast

Answer: The cell organelle.

Question 33. What is the main respiratory organ of a house lizard?

  1. Integument
  2. Nephridia
  3. External gills s
  4. Lungs

Answer: Lung is the main respiratory organ of the house lizards.

Question 34. Pyruvic acid is the end product of —

  1. Citric acid cycle
  2. Calvin cycle
  3. Glycolysis
  4. Photolysis

Answer: Pyruvic acid is the end product of Glycolysis.

Question 35. The respiratory organ of a cockroach is —

  1. Skin
  2. Gill
  3. Trachea
  4. Lung.

Answer: The respiratory organ of a cockroach is the Trachea.

Wbbse Life Science Class 9 Chapter 3 Multiple Choice Questions

Question 36. In which of the animals, the trachea is the respiratory organ?

  1. Cockroach
  2. Fish
  3. House lizard
  4. Earthworm.

Answer: The Trachea is the respiratory organ of the Cockroach.

Question 37. The respiratory organ of Crocodile is —

  1. Gill
  2. Skin
  3. Lung
  4. Trachea

Answer: The respiratory organ of a Crocodile is the Lung.

Question 38. Respiration in the absence of free oxygen is —

  1. Anaerobic
  2. Aerobic
  3. Alcoholic fermentation

Answer: Respiration in the absence of free oxygen is Anaerobic.

Question 39. An animal performing anaerobic respiration is —

  1. Earthworm
  2. Tapeworm
  3. Glow-worm
  4. None of the above

Answer: An animal performing anaerobic respiration is a Tapeworm.

Question 40. The percentage of oxygen in inspiratory air is —

  1. 16%
  2. 12.4%
  3. 20.60%
  4. 30%

Answer: The percentage of oxygen in inspiratory air is 20.60%

Question 41. What is the end product of Glycolysis?

  1. Citric acid
  2. Malic acid
  3. Nitric acid
  4. Pyruvic acid

Answer: Pyruvic acid is the end product of Glycolysis.

Question 42. In the cell of living organisms, the energy is stored in

  1. NADP
  2. ADP
  3. ATP
  4. PGA

Answer: In the cell of living organisms the energy is stored in ATP.

Question 43. In which animal does skin act as the main respiratory organ?

  1. Toad
  2. Prawn
  3. Cockroach
  4. Earthworm

Answer: Skin acts as the main respiratory organ in earthworms.

Question 44. The breathing organ of Rohu fish is —

  1. Green gland
  2. Trachea
  3. Gill
  4. Lung

Answer: The breathing organ of Rohu fish is the Gill.

Question 45. In which of the organs alveolus is seen?

  1. Liver
  2. Lung
  3. Skin
  4. Kidney

Answer: Alveolus is seen in Lung.

Question 46. Which one of the following is produced in muscle cells during anaerobic respiration?

  1. Acetic acid
  2. Lactic acid
  3. Ethyl alcohol
  4. Hydrochloric acid

Answer: Lactic acid is produced in muscle cells during anaerobic respiration.

Question 47. Which one of the following is called energy currency?

  1. NADH2
  2. ATP
  3. ADP
  4. FADH2

Answer: ATP is called energy currency.

Question 48. Cutaneous respiration takes place in

  1. Cockroach
  2. Earthworm
  3. Spider
  4. Amoeba.

Answer: Cutaneous respiration takes place in Earthworms.

Physiological Processes Of Life Mcq For Class 9 Bengali

Question 49. The respiratory organ of Periplanta Americana is

  1. Skin
  2. External gills
  3. Lung
  4. Trachea

Answer: The respiratory organ of Periplanta americana is the trachea.

Question 50. The respiratory organ of a shark is

  1. Lungs
  2. Trachea
  3. Internal gills
  4. External gills

Answer: The respiratory organ of sharks is the internal gills.

Question 51. How many ATP are produced from 1 gm mole glucose by aerobic respiration?

  1. 8 ATP
  2. 38 ATP
  3. 12 ATP
  4. 7 ATP

Answer: 38 ATP are produced from 1gm mole glucose by aerobic respiration.

Question 52. Glycolysis occurs within the

  1. Cytoplasm
  2. Mitochondria
  3. Plastids
  4. Nucleus

Answer: Glycolysis occurs within the cytoplasm.

Question 53. Due to the oxidation of how much glucose about 686 Kcal of energy is generated in aerobic respiration.

  1. 1 Molecule of glucose
  2. 1 gm molecule of glucose
  3. 1. gm of glucose
  4. 180 kg of glucose

Answer: Due to the oxidation of 1 molecule of glucose about 686 K cal of energy is generated in aerobic respiration.

Question 54. The biochemical pathway which produces pyruvic acid as an end product is —

  1.  Photolysis
  2. Glycolysis
  3. Kreb’s cycle

Answer: The biochemical pathway which produces pyruvic acid as an end product is glycolysis.

Question 55. Lactobacillus is used for making

  1. Acetic acid
  2. Alcohol
  3. Lactic acid from Lactose of milk.

Answer: Lactobacillus. is used for making lactic acid from lactose of milk.

Question 56. The labyrinthine organ is an accessory respiratory organ of

  1.  Scorpion
  2. Koi
  3. Crocodile
  4. Frog

Answer: The labyrinthine organ is an accessory respiratory organ of Koi.

Question 57. In which form of energy is the potential energy of the food usually liberated in respiration?

  1. Light energy
  2. Heat and kinetic energy
  3. Electric energy
  4. Kinetic energy

Answer: The potential energy of food is usually liberated in the form of heat energy and kinetic energy in respiration.

Question 58. What is the respiratory organ of a cockroach?

  1. Cell Membrane
  2. Moist skin
  3. Trachea
  4. Gills

Answer: The Trachea is the respiratory organ of a cockroach.

Question 59. In anaerobic respiration___ Keal energy is produced.

  1. 150
  2. 686
  3.  574
  4. 50

Answer: In anaerobic respiration 50 Kcal energy is produced.

Chapter 3 Physiological Processes Of Life Nutrition MCQs

Question 1. The secretion of which of the following glands does not contain any enzyme necessary for digestion?

  1. Liver
  2. Pancreas
  3. Salivary gland
  4. Glands of the small intestine

Answer: The secretion of the Liver does not contain any enzyme necessary for digestion.

Question 2. Amongst the following types of food, which one has Nitrogen as an essential component?

  1.  Fats
  2. Carbohydrates
  3. Proteins

Answer: Protein has Nitrogen as an essential component

Question 3. An example of a Symbiotic plant is —

  1. Cuscuta
  2. Agaricus
  3. Sundew
  4. Lichen

Answer: An example of a Symbiotic plant is Lichen.

Question 4. From which part of the human digestive system no carbohydrate-digesting enzyme is secreted?

  1. Buccal cavity
  2. Pancreas
  3. Intestine
  4. Stomach

Answer: From the Stomach, no carbohydrate-digesting enzyme is secreted.

Question 5. Cuscuta is a –

  1. Autotroph
  2. Heterotroph
  3. Parasite

Answer: Cuscuta is a Parasite.

Question 6. The Vitamin that can be synthesized in the human body is —

  1. K
  2. C
  3. A
  4. D

Answer: The Vitamin that can be synthesized in the human body is D.

Question 7. Which of the following acts as a source of energy in the body?

  1. Carbohydrate
  2. Vitamin
  3. Water
  4. Minerals

Answer: Carbohydrates act as a source of energy in the body.

Question 8. Which type of food provides nitrogen to the body?

  1. Carbohydrate
  2. Protein
  3. Fat
  4. Vitamin

Answer: Protein type of food provides nitrogen to the body.

Class 9 Life Science Chapter 3 Important Mcq With Solutions

Question 9. Which one of the following is the largest digestive gland in vertebrates?

  1. Salivary glands
  2. Pancreas
  3. Liver
  4. Intestinal gland

Answer: The liver is the largest digestive gland in vertebrates.

Question 10. The proteolytic enzyme in pancreatic juice is —

  1. Amylase
  2. Lipase
  3. Trypsin
  4. Pepsin

Answer: The proteolytic enzyme in pancreatic juice is Trypsin.

Question 11. The chemical name of Vitamin C is —

  1. Ascorbic acid
  2. Retinol
  3. Phylloquinone
  4. Nicotinic acid

Answer: The chemical name of Vitamin C is Ascorbic acid.

Question 12. Which of the following parts of the human digestive system does not secrete protein and oil or fat digestive enzyme?

  1. Mouth
  2. Pancreas
  3. Small intestine
  4. Stomach

Answer: The mouth does not secrete protein and oil or fat digestive enzymes.

Question 13. Due to deficiency of which of the following demented chlorosis occurs in plants?

  1. Calcium
  2. Oxygen
  3. Magnesium
  4. Sodium

Answer: Due to deficiency Magnesium chlorosis occurs in plants.

Question 14. In which of the following parts of the digestive system of the human body digested food substances are absorbed?

  1. Oesophagus
  2. Liver
  3. Pancreas
  4. Small intestine

Answer:  Digested food substances are absorbed in the Small intestine.

Question 15. Which of the following organs produces bile?

  1. Gall bladder
  2. Pancreas
  3. Liver

Answer: The liver produces bile.

Question 16. The name of the enzyme which is present in the saliva and which acts upon carbohydrate food is —

  1. Pepsin
  2. Ptyalin
  3. Amylase
  4. Erepsin

Answer: The name of the enzyme which is present in the saliva and which acts upon carbohydrate food is Ptyalin.

Question 17. The bile duct enters —

  1. Liver
  2. Pancreas
  3. Duodenum

Answer: The bile duct enters Duodenum.

Question 18. Deficiency of which vitamin produces anaemia?

  1. Vitamin B1
  2. Vitamin B12
  3. Vitamin B6
  4. Vitamin B2

Answer: Deficiency of Vitamin B12 produces anaemia.

Question 19. Which vitamin contains cobalt?

  1. Vit B1
  2. Vit B2
  3. Vit B12
  4. Vit C

Answer: Vit B12contains cobalt.

Question 20. Which of the following diseases results due to deficiency of Vitamin A’?

  1. Rocket
  2. Scurvy
  3. Night blindness
  4. Beri-Beri

Answer: Night blindness disease results due to a deficiency of Vitamin ‘A’.

Question 21. Where are villi situated?

  1. In kidney
  2. In lungs
  3. Buccal cavity
  4. Small intestine

Answer: Villi are situated in the Small intestine.

Question 22. What is pepsin?

  1. Animal hormone
  2. Enzyme
  3. Plant hormone
  4. Panes material

Answer: Pepsin is an Enzyme.

Question 23. Which one of the following vitamins is water soluble?

  1. Vitamin A
  2. Vitamin C
  3. Vitamin D
  4. Vitamin E

Answer: Vitamin C is water soluble.

West Bengal Board Class 9 Life Science Chapter 3 Mcq

Question 24. Which one of the following elements is required as a trace element in the plant?

  1. Carbon
  2. Nitrogen
  3. Boron
  4. Phosphorus

Answer: Boron is required as a trace element in plants.

Question 25. Which one of the following is hindered due to deficiency of vitamin ‘A’ causing “night blindness” ?

  1. Rod cell construction
  2. Retina construction
  3. Nerve cell construction

Answer: Rod cell construction is hindered due to a deficiency of vitamin ‘A’ causing “night blindness”.

Question 26. The Vitamin synthesized in the human skin is —

  1. Vitamin K
  2. Vitamin C
  3. Vitamin A
  4. Vitamin D

Answer: The Vitamin synthesized in human skin is Vitamin D.

Question 27. An animal Starch is —

  1. Glycogen
  2. Albumin
  3. Sucrose
  4. Maltose

Answer: An animal Starch is Glycogen.

Question 28. Blood coagulation does not occur due to the deficiency of which Vitamin?

  1. Vitamin A,
  2. Vitamin B12,
  3. Vitamin C,
  4. Vitamin K

Answer: Blood coagulation does not occur due to the deficiency of Vitamin K.

Question 29. Mainly from which molecule of the following, energy is released?

  1. Protein
  2. Glycerol
  3. Glucose
  4. Amino acid

Answer: Energy is released mainly from glucose molecules.

Question 30. A microelement helpful in plant nutrition is.

  1. Nitrogen
  2. Potassium
  3. Zine
  4. Phosphorus

Answer: A micro element helpful in Plant nutrition is Zinc.

Question 31. Due to the deficiency of which Vitamin the disease Ricket occurs in children?

  1. Vitamin A
  2. Vitamin C
  3. Vitamin D
  4. Vitamin K

Answer: Due to the deficiency of Vitamin D the disease Ricket occurs in children.

Question 32. The component of food which does not yield energy is

  1. Carbohydrate
  2. Protein
  3. Fat
  4. Vitamin.

Answer: The component of food which does not yield energy is Vitamin.

Question 33. Pellagra is caused due to the deficiency of 3

  1. Amino acid
  2. Nicotinic acid
  3. Citric acid
  4. Lactic acid

Answer: Pellagra is caused by to deficiency of Nicotinic acid.

Question 34. The gland from which. three types of digestive enzymes are secreted is —

  1. Liver
  2. Pancreas
  3. Salivary gland
  4. Gastric gland

Answer: The gland from which three types of digestive enzymes are secreted is the pancreas.

Question 35. Deficiency of which Vitamin causes Scurvy?

  1. Vitamin A
  2. Vitamin D
  3. Vitamin E
  4. Vitamin C

Answer: Deficiency of Vitamin C causes scurvy.

Question 36. Which mineral is present in haemocyanin pigment?

  1. Fe
  2. Mg
  3. Cu
  4. Co

Answer: Cu mineral is present in haemocyanin pigment.

Question 37. Which animal from the following organisms can prepare its food?

  1. Toad
  2. Eugiena
  3. Mucor
  4. Mango tree

Answer: Euglena can prepare its food.

Question 38. Proteins contain —

  1. Calcium
  2. Magnesium
  3. Iron
  4. Nitrogen

Answer: Proteins contain Nitrogen,

Question 39. The substance which is not carbohydrates

  1. Cane sugar
  2. Sioumin
  3. Lactose
  4. Albumin

Answer: The substance which is not a carbohydrate is Albumin.

Question 40. The antivitamin preventing the action of biotin is

  1. Carotene
  2. Avidin
  3. Pyrimethamine

Answer: The antivitamin preventing the action of biotin is avidin.

Question 41. Protein can be digested by —

  1. Ptyalin
  2. Lipase
  3. Pepsin
  4. Maltase

Answer: Protein can be digested by Pepsin.

Question 42. Which one of the following diseases is caused by to deficiency of Vitamin E?

  1. Night blindness
  2. Infertility
  3. Rocket
  4. Scurvy

Answer: Infertility disease is caused by to deficiency of Vitamin E.

Question 43. The metallic ion was essential for blood coagulation—.

  1. Cat*
  2. Kt
  3. Mg**
  4. Na*

Answer: The metallic ion esser.: al for blood coagulaton is ca**.

Question 44. The major reason for anaemia in the human body is the deficiency of

  1. Iodine in food
  2. Calcium in food
  3. Magnesium in food
  4. Iron in food

Answer: The major reason for anaemia in the human body is the deficiency of Iron in food.

Question 45. The digestion of carbohydrates occurs in which of the following in man?

  1. Buccal cavity
  2. Stomach
  3. Buccal cavity and stomach
  4. Buccal cavity and Small intestine

Answer: The digestion of carbohydrates occurs in the buccal cavity and small intestine.

Physiological Processes Of Life Class 9 Mcq Online Test Wbbse

Question 46. The enzyme which is not present in succus entericus is_

  1. Trypsin
  2. Maltase
  3. Sucrase
  4. Lactase

Answer: The enzyme which is not present in succus entericus is trypsin.

Question 47. Deficiency of Iodine leads to.

  1. Anaemic
  2. Pellagra
  3. Goitre

Answer: Deficiency of iodine leads to goitre.

Question 48. Xeropthalmia is caused by the deficiency of ss.

  1. Vitamin A
  2. Vitamin B12
  3. Vitamin C
  4. Vitamin D

Answer: Xeropthalmia is caused by a deficiency of Vitamin A.

Question 49. A total Parasiteis_

  1. Mucor
  2. Spirogyra
  3. Swarnlata
  4. Agaricus

Answer: A total Parasite is Swarnlata.

Question 50. Citrus fruits like oranges contain

  1. Vitamin A
  2. Vitamin B
  3. Vitamin C
  4. Vitamin D

Answer: Citrus fruits like oranges contain Vitamin C.

Question 51. Oxyntic cells are responsible for the secretion of —

  1. Pepsin
  2. Ptyalin
  3. HCI
  4. None

Answer: Oxyntic cells are responsible for the secretion of HCl.

Question 52. Which element is known as an enzyme activator?

  1. Zinc
  2. Copper
  3. Molybdenum
  4. Iron

Answer: Zinc is known as an enzyme activator.

Question 53. Osteomalacia is caused by the deficiency of —

  1. Vitamin A
  2. Vitamin D
  3. Vitamin E
  4. Vitamin K

Answer: Osteomalacia is caused by the deficiency of Vitamin D.

Question 54. The organic substance from which energy is not obtained is —

  1. Protein
  2. Carbohydrate
  3. Fat
  4. Vitamins

Answer: The organic substance from which energy is not obtained is Vitamins.

Class 9 Life Science Physiological Processes Mcq In Bengali

Question 55. The metallic element which is required for the formation of haemoglobin is —

  1. Iron (Fe)
  2. Calcium (Ca)
  3. Magnesium (Mg)
  4. Potassium (K)

Answer: The metallic element which is required for the formation of haemoglobin is Iron (Fe).

Question 56. Which digestive juice in your body would turn a blue litmus paper red?

  1. Salivary juice
  2. Bile juice
  3. Pancreatic juice
  4. Gastric juice

Answer: Gastric Juice turns a blue litmus paper red.

Question 57. Of the following, is a protective food.

  1. Carbohydrate
  2. Vitamin
  3. Protein
  4. Fat

Answer: Of the following, vitamin is a protective food.

Question 58. A child has swollen and bleeding gums. Which food could he be given to reduce the symptoms?

  1. Germinating gram seeds
  2. Carrot
  3. Egg
  4. Lemon

Answer: Lemon should be given to him to reduce the symptoms.

Question 60. Deficiency of which mineral causes chlorosis in plants?

  1. Mg
  2. Ca
  3. Na
  4. Al

Answer: A deficiency of Magnesium causes chlorosis in plants.

Question 61. An enzyme which is secreted from the stomach is —

  1. Trypsin
  2. Pepsin
  3. Ptyalin
  4. Erepsin

Answer: An enzyme which is secreted from the stomach is Pepsin.

Question 62. Which one of the following is a fat-soluble vitamin?

  1. Vitamin ‘B1’
  2. Vitamin ‘D’.
  3. Vitamin ‘C’
  4. Vitamin ‘B12‘

Answer: Vitamin ‘D’ is a fat-soluble vitamin.

Question 63. The nutrients are —

  1. Vitamins
  2. Minerals
  3. Water
  4. All these

Answer: (4) all these.

Question 64. Fats provide more energy than carbohydrates because —

  1. Fat contains more hydrogen
  2. Fat contains more oxygen
  3. Fat contains more useful substances
  4. Fat contains more carbon.

Answer: 1. Fat contains more hydrogen.

Question 65. Monosaccharides are linked together by —

  1. Hydrogen bond
  2. Glucoside bond
  3. Linkage bond
  4. None of these

Answer: 1. Hydrogen bond.

Question 66. The chief stored form of carbohydrate in animals is —

  1. Starch
  2. Glycogen
  3. Sucrose
  4. Maltose

Answer: 2. Glycogen.

Question 67. A derived lipid is —

  1. Sterols
  2. Phospholipid
  3. Glycolipids
  4. Fatty acids

Answer: 1. Sterols.

Question 68. Cod liver oil is a rich source of —

  1. Vit Band C
  2. Vit A and D
  3. Vit A and C
  4. Vit D and K

Answer: 2. Vit A and D.

Question 69. The calorific value of fat is —

  1. 4.3 kcal
  2. 9.7 kcal
  3. 9.3 kcal
  4. 4.1 kcal

Answer: 3. 9.3 kcal.

Question 70. The simplest form of protein is —

  1. Glucose
  2. Glycerol
  3. Amino acid
  4. Ester

Answer: 3. Amino acid.

Question 71. The essential amino acid is —

  1. Valine
  2. Histidine
  3. Methionine
  4. All

Answer: 4. All.

Question 72. A derived protein is —

  1. Glycine
  2. Polypeptides
  3. Serine
  4. All

Answer: 2. Polypeptides.

Question 73. An element acts as a growth promoter and is present in vitamin B-12. What is it?

  1. Chlorine
  2. Copper
  3. Cobalt
  4. Calcium

Answer: 3. Cobalt.

Question 74. Vitamine acts as —

  1. Enzyme
  2. Co-enzyme
  3. Solvent
  4. Promoter

Answer: 2. Co-enzyme.

Question 75. Caroten is the provitamin of —

  1. VitA
  2. Vit D
  3. Vit C
  4. Vit K

Answer: 1. Vit A.

Question 76. An example of antivitamin is —

  1. Ergosterol
  2. Avidin
  3. Carotene
  4. None of these

Answer: 2. Avidin.

Question 77. Nyctalopia is caused due to the deficiency of —

  1. VitC
  2. Vit D
  3. VitK
  4. VitA

Answer: 4. Vit A.

Question 78. A bone disease due to the deficiency of Vit D is —

  1. Xeropthalmia
  2. Osteomalacia
  3. Beriberi
  4. Night blindness

Answer: 2. Osteomalacia.

Question 79. The symptoms of 3D disease for

  1. Anaemia
  2. Scurvy
  3. Pellagra
  4. Rickets

Answer: 3. Pellagra.

Question 80. The chemical name of Vit E is —

  1. Calciferol
  2. Thiamine
  3. Tocopherol
  4. Riboflavin

Answer: 3. Tocopherol.

Question 81. A total stem parasite is

  1. Cuscuta
  2. Dodder
  3. Swarnlata
  4. All

Answer: 4.  All.

Question 82. A partial saprophytic plant is

  1. Mucor
  2. Agaricus
  3. Montropa
  4. Pinus

Answer: 4. Pinus

Question 83. An insectivorous plant is

  1. Nepenthes
  2. Calcutta
  3. Orchid
  4. Cycas

Answer: 1. Nepenthes.

Question 84. The optimum temperature for enzyme activity is —

  1. 20-25°C
  2. 30-40°C
  3. 35-40°C
  4. 30-55°C

Answer: 3. 35—40°C

Question 85. The bile juice is stored in—

  1. Liver
  2. Pancreas
  3. Spleen
  4. Gall bladder

Answer: 4. Gall bladder.

Question 86. The proteolytic enzyme present in intestinal juice is —

  1. Pepsin
  2. Trypsin
  3. Erepsin
  4. Ptyalin

Answer: 3. Erepsin.

Question 87. Lacteals are present in—

  1. Villi
  2. Alveoli
  3. Stomach
  4. Mouth

Answer: 1. Villi.

Question 88. Milk does not contain ~

  1. Vit C
  2. Iron
  3. Calcium
  4. Both 1 and 3

Answer: 1. Vit C.

Question 89. Which of the following supplies nitrogen to the body?

  1. Carbohydrate
  2. Fat
  3. Protein
  4. Vitamin

Answer: 3. Protein.

Question 90. Which one of the following vitamins is water soluble?

  1. VitA
  2. Vit C
  3. Vit D
  4. VitE

Answer: 3. Vit C.

Question 91. The major reason for anaemia in the human body is the deficiency of

  1. Iodine in food
  2. Calcium in food
  3. Magnesium in food
  4. Iron in food

Answer: 4. Iron in food.

Question 92. The partly digested food in the stomach is called —

  1. Cite
  2. Chyme
  3. Mastication
  4. Chewing

Answer: 2. Chyme.

Question 93. Which one is non-functional in humans?

  1. Caecum
  2. Colon
  3. Gall bladder
  4. Rectum

Answer: 1. Caecum.

Question 94. The largest digestive gland in the human body is =

  1. Pancreas
  2. Gastric gland
  3. Liver
  4. Salivary gland

Answer: 3. Liver.

Question 95. Asymbiontic association between plants and animals is —

  1. Algae and fungi
  2. Zoochlorella and hydra
  3. Bacteria and fungi
  4. None of these

Answer: 2. Zoochlorella and hydra.

Question 96. Which one is the heterotrophs from —

  1. Mango
  2. Neem
  3. Mucor
  4. Hibiscus

Answer: 3. Mucor.

Question 97. An organism that breaks up the food before ingestion is —

  1. Tapeworm
  2. Roundworm
  3. Bacteria
  4. Cat

Answer: 3. Bacteria.

Question 98. Which one is the example of roughage?

  1. Pulses
  2. Rice
  3. Dalia
  4. Mango

Answer: 3. Dalia.

Question 99. The process of formation of glycogen from glucose takes place in —

  1. Muscle
  2. Liver
  3. Stomach
  4. Both muscle and liver

Answer: 4. Both muscle and liver

Question 100. The process by which glycogen is broken down to glucose is called—

  1. Glycogenesis
  2. Glycogenolysis
  3. Glucogenesis
  4. All of these

Answer: 2. Glycogenolysis.

Question 101. Simplest Carbohydrate is —

  1. Polysaccharides
  2. Disaccharides
  3. Monosaccharides
  4. Amino acids

Answer: 3. Monosaccharides.

Question 102. The protein part of an enzyme is —

  1. Co-enzyme
  2. Apoenzyme
  3. Prosthetic group
  4. None of these

Answer: 1. Co-enzyme.

Question 103. The scientist who first introduced the term enzyme is —

  1. Munch
  2. Lindeman
  3. Kuhn
  4. Loandsteiner

Answer: 3. Kuhn.

Question 104. The digestive juice that does not contain enzymes is —

  1. Saliva
  2. Gastric juice
  3. Bile juice
  4. Pancreatic juice

Answer: 3. Bile juice.

Chapter 3 Physiological Processes Of Life Circulation MCQs

Question 1. Blood of which of the following animals does not contain RBC?

  1. Earthworm
  2. Toad
  3. Man
  4. Fish

Answer: The blood of Earthworm does not contain RBC.

Question 2. Which one of the following three is not seen in the open type of circulatory system?

  1. Artery
  2. Haemocoel
  3. Capillary

Answer: Capillary is not seen in the open type of circulatory system.

Question 3. In the blood of which of the following animals, haemocyanin is present?

  1. Earthworm
  2. Prawn
  3. Cockroach
  4. Toad

Answer: In the blood of Prawn haemocyanin is present.

Question 4. In which of the chambers of the human heart, oxygenated blood is received?

  1. Right ventricle
  2. Left auricle
  3. Right auricle
  4. Left ventricle

Answer: In the Left, auricle of the human heart oxygenated blood is received.

Question 5. The main function of white blood corpuscles (WBC) is to —

  1. Produce Red Blood Corpuscles (RBC)
  2. Destroy bacteria
  3. Distribute heat
  4. Clotting of blood

Answer: The main function of white blood corpuscles (WBC) is to destroy bacteria.

Question 6. Lymph returns to blood through —

  1. Capillary
  2. Artery
  3. Vein
  4. Lymph vessel

Answer: Lymph returns to blood through Lymph vessels.

Question 7. The function of the right ventricle is

  1. To transmit oxygenated blood
  2. To transmit blood rich in CO2
  3. To receive blood rich in CO2
  4. To receive oxygenated blood

Answer: The function of the right ventricle is to transmit blood rich in CO2.

Question 8. Which one of the following in excessive numbers is responsible for Leukemia (Blood cancer)?

  1. Microbes
  2. Blood platelets
  3. W.B.C
  4. R.B.C

Answer: W.B.C. in excessive numbers is responsible for Leukemia (Blood cancer).

Question 9. Respiratory pigment present in the blood of man is

  1. Haemocyanin
  2. Haemolymph
  3. Haemocyte
  4. Haemoglobin

Answer: The respiratory pigment present in the blood of man is haemoglobin.

Question 10. Open blood circulation is seen in—

  1. Earthworm
  2. Human
  3. Toad
  4. Cockroach

Answer: Open blood circulation is seen in Cockroach.

Question 11. What are the veins having capillaries at both ends called?

  1. Systemic veins
  2. Pulmonary veins
  3. Portal veins
  4. Vena cava

Answer: Veins having capillaries at both ends are called Portal veins.

Question 12. Which one of the following metallic elements is needed in the formation of a haemoglobin molecule? [MP-2002]

  1. Magnesium
  2. Iron
  3. Potassium
  4. Calcium

Answer: Iron is needed in the formation of haemoglobin molecules.

Question 13. Lacteal contains —

  1. Deoxygenated blood
  2. Lymph
  3. Plasma

Answer: Lacteal contains lymph.

Question 14. Which vein of man carries oxygenated blood?

  1. Portal vein
  2. Renal vein
  3. Pulmonary vein
  4. Facial vein

Answer: The pulmonary vein of a man carries oxygenated blood.

Question 15. The mitral valve is present at the —

  1. Junction of right atrium and right ventricle
  2. Junction of left atrium and left ventricle
  3. Ventricle and aorta
  4. Ventricle and pulmonary artery

Answer: The mitral valve is present at the junction of the left atrium and left ventricle.

Question 16. An animal whose blood does not carry oxygen is

  1. Prawn
  2. Fish
  3. Amoeba
  4. Cockroach

Answer: Cockroach blood does not carry oxygen.

Question 17. In which of the following animals is an open circulatory system found?

  1. Prawn
  2. Earthworm
  3. Toad
  4. Man

Answer: The open circulatory system is found in Prawn.

Question 18. The largest cell of the blood is —

  1. Monocyte
  2. Neutrophil
  3. Eosinophil
  4. Lymphocyte

Answer: The largest cell of the blood is Monocyte.

Question 19. What is the name of the element that helps in blood coagulation?

  1. Sodium
  2. Magnesium
  3. Calcium
  4. Phosphorus

Answer: The element that helps in blood coagulation is Calcium.

Question 20. Which one is related to the other three?

  1. Lymphocyte
  2. Monocyte
  3. Leucocyte
  4. Eosinophil

Answer: Leucocyte is related to the other three.

Question 21. Which protein is absent in serum?

  1. Fibrinogen
  2. Globulin
  3. Albumin
  4. Bilirubin

Answer: Fibrinogen protein is absent in serum.

Question 22. The function of the left auricle in the human heart is—

  1. To transmit oxygenated blood
  2. To transmit blood rich in CO2
  3. To receive blood rich in CO2,
  4. To receive oxygenated blood

Answer: The function of the left auricle in the human heart is to receive oxygenated blood.

Question 23. In the plasma of which of the following animals is haemoglobin present?

  1. Earthworm
  2. Prawn
  3. Cockroach
  4. Toad

Answer: Hemoglobin is present in the plasma of Earthworms.

Question 24. From which of the chambers of the human heart is oxygenated blood transmitted to different parts of the body?

  1. Right auricle
  2. Left ventricle
  3. Right ventricle
  4. Left auricle

Answer: From the Left ventricle of the human heart oxygenated blood is transmitted to different parts of the body.

Question 25.____ in the blood of group ‘O’.

  1. Agglutiongen is not present —_
  2. Agglutinin is not present
  3. Agglutinogen ‘A’, is present
  4. Agglutinogen ‘AB’ is present

Answer: Agglutinogen is not present in the blood of group ‘O’.

Question 26. In which pair of the following animal’s haemoglobin is found?

  1. Man and cockroach
  2. Cockroach and Earthworm
  3. Man and Earthworm
  4. Prawn and cockroach

Answer: Haemoglobin is found in the blood of man and Earthworm.

Question 27. Heparin is secreted from —

  1. Basophil
  2. Neutrophil
  3. Eosinophil

Answer: Heparin is secreted from basophil.

Question 28. Cardiac muscle is

  1. Voluntary striated
  2. Non-voluntary striated muscle
  3. Voluntary smooth muscle
  4. Non-voluntary smooth muscle

Answer: The cardiac muscle is a non-voluntary striated muscle.

Question 29, Lecuocytes which help in antibody formation is

  1. Eosinophil
  2. Neutrophil
  3. Monocyte
  4. Lymphocyte

Answer: Leucocytes which help in antibody formation lymphocytes.

Question 30. Lymph is a tissue fluid which contains ~

  1. Leucocytes
  2. Serum
  3. Erythrocytes
  4. None of the above

Answer: Lymph is a tissue fluid which contains leucocytes.

Question 31. Which one is the organic part of blood?

  1. Albumin
  2. Fibrinogen
  3. Calcium
  4. Urea

Answer: Fibrinogen is the organic part of blood.

Question 32. The life of RBC in man is

  1. 90 days
  2. 120 days
  3. 60 days
  4. 220 days

Answer: The life span of RBC in men is 120 days.

Question 33. Suppose your blood group is ‘0’ you can receive blood from a person 1aving blood group —

  1. Group ‘A’
  2. Group ‘B’
  3. Group ‘AB’
  4. Group ‘O’

Answer: Suppose your blood group is ‘0’, You can receive blood from a person having blood group ‘0’.

Question 34. The plasma protein that helps in clotting of blood is—

  1. Prothrombin
  2. Albumin
  3. Fibrin

Answer: The plasma protein that helps in the clotting of blood is prothrombin.

Question 35. The kind of cell absent in lymph is —

  1. Monocyte
  2. Lymphocyte
  3. Basophil

Answer: The kind of cell absent in lymph is Basophil.

Question 36. The agglutinin present in Blood Group B is —

  1. Alpha
  2. Beta
  3. Both Alpha and Beta
  4. No agglulitinin at all

Answer: The agglutinin present in Blood Group Bis is Alpha.

Question 37. Haemoglobin is dissolved in Plasma in —

  1. Toad
  2. Earthworm
  3. Man
  4. Camel

Answer: Haemoglobin is dissolved in Plasma in earthworms.

Question 38. A person with ‘A’ blood group can take blood from ___ blood group

  1. A
  2. O
  3. B
  4. A and O

Answer: A person with an ‘A’ blood group can take blood from ‘A’ and ‘O’ blood groups.

Question 39. Blood coagulation is hampered due to the absence of ___.

  1. Vitamin A and Vitamin K
  2. Vitamin D.and Magnesium
  3. Vitamin K and Calcium
  4. Vitamin A and Calcium

Answer: Blood coagulation is hampered due to the absence of Vitamin K and Calcium.

Question 40. Which component of the blood carries O2 & CO2?

  1. Red blood corpuscles
  2. White blood corpuscles
  3. Red and white blood corpuscles
  4. Platelets

Answer: Red blood corpuscles of blood carry O2 & CO2.

Question 41. The blood corpuscle that causes phagocytosis is

  1. RBC
  2. Platelets
  3. Lymphocyte
  4. Neutrophil

Answer: The blood corpuscle that causes phagocytosis is Neutrophil.

Question 42. In which pair of the following animal’s haemoglobin is found?

  1. Man and cockroach
  2. Mosquito and earthworm
  3. Man and earthworm
  4. Prawn and cockroach

Answer: Haemoglobin is found in the blood of man and earthworms.

Question 43. The existence of solvent molecules in the cell is called-

  1. Endosmosis
  2. Exosmosis
  3. Diffusion
  4. Turgidity

Answer: 2. Exosmosis

Question 44. The transport of food from the leaf to different parts of the plant is called-

  1. Transpiration
  2. Translocation
  3. Guttation
  4. Circulation

Answer: 2. Translocation

Question 45. The instrument used to measure the rate of transpiration is —

  1. Sphygmomanometer
  2. Ganong’s photometer
  3. Spirometer
  4. Speedometer

Answer: 2. Ganong’s photometer

Question 46. In hydra and starfish, the medium of circulation is —

  1. Blood
  2. Lymph
  3. Water
  4. Salt

Answer: 3. Water

Question 47. Non-protein nitrogenous substance (NPN) is —

  1. Urea
  2. Uric acid
  3. Creatinine
  4. All

Answer: 4. All

Question 48. The life span of platelets is —

  1. 1-5 days
  2. 15-20 days
  3. 5-9 days
  4. 100-150 days

Answer: 3. 5-9 days

Question 49. Bile pigments are —

  1. Haemoglobin and haemocyanin
  2. Bilirubin and biliverdin
  3. Plasma and Serum
  4. Platelets

Answer: 2. Bilirubin and biliverdin

Question 50. The ratio of WBC and RBC in our body is roughly —

  1. 1: 20
  2. 1: 100
  3. 1: 500
  4. 1: 700

Answer: 4. 1: 700

Question 51. The WBC cells which are phagocytic are —

  1. Neutrophil
  2. Lymphocytes
  3. Monocytes
  4. Both 1 and 2

Answer: 4. Both a and b

Question 52. Serotonin is secreted from —

  1. Platelets
  2. Basophils
  3. Neutrophils
  4. Eosinophils

Answer: 1. Platelets

Question 53. Heparin, an anticoagulant, is secreted from —

  1. Eosinophil
  2. Basophil
  3. Neutrophil
  4. None of these

Answer: 2. Basophil

Question 54. Haemocyanin is a copper-containing pigment of blood found in —

  1. Earthworm
  2. Crab
  3. Tapeworm
  4. All of these

Answer: 2. Crab

Question 55. Blood circulation is described by —

  1. William Harvey
  2. Karl Landsteiner
  3. August Weisman
  4. Lindemann

Answer: 1. William Harvey

Question 56. The breaking down of RBC is called —

  1. Phagocytosis
  2. Pinocytosis
  3. Haemolysis
  4. Blood clotting

Answer: 3. Haemolysis

Question 57. The elements used in blood clotting are—

  1. Sodium
  2. Potassium
  3. Calcium
  4. Carbon

Answer: 3. Calcium

Question 58. The open circulatory system is found in—

  1. Cockroach
  2. Grasshopper
  3. Snail
  4. All of these

Answer: 4. All of these.

Question 59. The mitral valve is located

  1. Between the left auricle and left ventricle
  2. Between the right auricle and right ventricle
  3. Between the left ventricle and Aorta
  4. None of these

Answer: Between left auricle and left ventricle

Question 60. Haemophilia is a –

  1. Bacterial disease
  2. Protozoan disease
  3. Genetic disorder
  4. Viral disease

Answer: 3. Genetic disorder

Question 61. The canal system as the circulatory system is found in —

  1. Hydra
  2. Earthworm
  3. Sponges
  4. Tapeworm

Answer: 3. Sponges

Question 62. In cockroaches, the heart is made up of —

  1. Four pairs of Pulsatile tubes
  2. A small sac-like
  3. Thirteen funnel-shaped chamber
  4. Three chambered.

Answer: 3. Thirteen funnel-shaped chamber

Question 63. The covering membrane of the heart is —

  1. Meninges
  2. Pleura
  3. Pericardium
  4. Peristome

Answer: 3. Pericardium

Question 64. The wall of capillaries is formed by —

  1. Endothelium
  2. Exothelium
  3. Mesodirm
  4. All of these

Answer: 1. Endothelium

Question 65. The circulating medium of insects is called —

  1. Haemoglobin
  2. Haemocyanin
  3. Haemolymph
  4. None of these

Answer: 3. Haemolymph

Question 66. The ascent of sap in plants takes place through —

  1. Sieve tube
  2. Xylem parenchyma
  3. Xylem vessels
  4. Companion cells

Answer: 3. Xylem vessels

Wbbse Class 9 Life Science Chapter 3 Mcq Questions And Answers

Question 67. Cohesive–adhesive force theory was proposed by —

  1. Stephan and Hales
  2. Curtis
  3. Dixon and jolly
  4. Munch

Answer: 3. Dixon and Jolly

Question 68. Non-nucleated corpuscles present in human blood is —

  1. Leucocytes
  2. Erythrocytes
  3. Lymphocytes
  4. 1 and  3

Answer: 2. Erythrocytes

Question 69. The smallest blood corpuscles are —

  1. Thrombocytes
  2. Erythrocytes
  3. Phagocytes
  4. Monocytes

Answer: 1. Thrombocytes

Question 70. The universal donor is —

  1. Group ‘O’ individual
  2. Group ‘AB’ individual
  3. Group ‘B’ individual
  4. Group ‘A’ individual

Answer: 1. group ‘O’ individual

Question 71. The largest artery is —

  1. Vena cava
  2. Aorta
  3. Capillaries
  4. Veins

Answer: 2. Aorta

Question 72. In the absence of which vitamin, blood coagulation does not take place?

  1. vital
  2. Vit-B12
  3. Vit-C
  4. Vit-K

Answer: 4. Vit-K

Question 73. Which of the following animals has haemoglobin in its plasma?

  1. Earthworm
  2. Prawn
  3. Cockroach
  4. Toad

Answer: 1. Earthworm

Question 74. Which two animals have haemoglobin in their blood?

  1. Human and cockroach
  2. Cockroach and earthworm
  3. Prawn and cockroach
  4. Human and earthworm.

Answer: Human and earthworm.

Question 75. Which of the following metallic elements is required for the synthesis of haemoglobin molecule?

  1. Magnesium
  2. Calcium
  3. Iron
  4. Potassium

Answer: 3. Iron

Chapter 3 Physiological Processes Of Life Excretion MCQs

Question 1. Which of the following alkaloids is found in Rauvolfia?

  1. Morphine
  2. Nicotine
  3. Reserpine
  4. Quinine

Answer: 3. Reserpine.

Question 2. Which one is not a nitrogenous waste product?

  1. Quinine
  2. Creatin
  3. Daturine
  4. Tanin

Answer: 4. Tanin.

Question 3. The sweat gland is present in —

  1. Kidney
  2. Lungs
  3. Skin
  4. Liver

Answer: 3. Skin.

Question 4. Latex is the excretory product of —

  1. Arjuna
  2. Rubber
  3. Sajina
  4. Apple

Answer: 2. Rubber.

Question 5. The hormone produced in the kidney is —

  1. Erythropoietin
  2. ADH
  3. Vasopressin
  4. None of these

Answer: 1. Erythropoietin.

Question 6. Cystolith contain —

  1. Oxalate
  2. Calcium Carbonate
  3. Potassium nitrate
  4. All of these

Answer: 2. Calcium Carbonate.

Question 7. Which of the following alkaloids is found in Cinchona?

  1. Nicotine
  2. Reserpine
  3. Morphine
  4. Quinine

Answer: 4. Quinine.

Question 8. Raphide is found in —

  1. Banyan
  2. Arum
  3. Guava
  4. Apple

Answer: 2. Arum.

Question 9. Where does the ornithine cycle operate?

  1. In stomach
  2. In liver
  3. In kidney
  4. In spleen

Answer: 2. In liver.

Question 10. Which material makes urine faintly yellowish?

  1. Blood
  2. Bilirubin
  3. Haemoglobin
  4. Bile pigment

Answer: 2. Bilirubin.

Question 11. Which animal has nephridia as an excretory organ?

  1.  Cockroach
  2.  Leech
  3. Toad
  4. Tapeworm

Answer: 2. Leech.

Question 12. Which of the following alkaloids is used to decrease blood pressure in humans?

  1.  Nicotine
  2. Reserpine
  3. Quinine
  4. Morphine

Answer: 2. Reserpine.

Chapter 3 Physiological Processes Of Life Transpiration

Question 1. The loss of unused water of the plant body liberated into the atmosphere in the form of vapour is called —

  1.  Evaporation
  2. Transpiration
  3. Guttation
  4. None of these

Answer: 2. Transpiration

Question 2. Transpiration is least in —

  1. High wind velocity
  2. High atmospheric humidity
  3. Dry soil moisture
  4.  Dry environment

Answer: 3. Dry soil moisture

Question 3. Which one is an internal factor of transpiration?

  1. Light
  2. Temperature
  3. Wind velocity
  4. Structure of leaf

Answer: 4. Structure of leaf

Chapter 3 Physiological Processes Of Life Movement Of Water, Minerals, Food And Gases

Question 1. Movement of water in the cortex of root outside to inside is due to —

  1. The gradient of chemical potential
  2. The gradient of water potential
  3. Accumulation of inorganic salts
  4. Accumulation of organic solutes

Answer: 2. The Gradient of water potential

Question 2. The extracellular solutions which contain less concentration of the solutes and have higher solvent concentration than the cytoplasm are known as—

  1.  Isotonic solution
  2. Hypertonic solution
  3. Hypotonic solution
  4. None of these

Answer: 3. Hypotonic solution

Question 3. The active hydrostatic pressure created in the parenchymatous cortical cells of the roots is called —

  1. Turgor pressure
  2. Osmotic pressure
  3. Suction pressure
  4. Root pressure

Answer: 1. Turgor pressure

Question 4. Membrane which allows all the molecules or ions of a solution (both solute and solvent molecules) to pass through is called —

  1. Impermeable membrane
  2. Permeable membrane
  3. Semi-permeable membrane
  4. Selectively permeable membrane

Answer: 2. Permeable membrane

Question 5. Which one is largely responsible for the ascent of sap?

  1. Capillary theory
  2. Pulsation theory
  3. Root pressure theory
  4. Cohesion force and transpiration pull theory

Answer: 2. Pulsation theory

Question 6. Which one of the following helps in the ascent of sap?

  1. Capillarity
  2. Root pressure
  3. Transpiration
  4. All of these

Answer: 4. All of these

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