NEET Biology Class 9 Chapter 1 The Fundamental Unit of Life Multiple Choice Question And Answers

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The Fundamental Unit of Life Multiple Choice Questions

Question 1. Which of these is the smallest in size?

  1. Ribosome
  2. Lysosome
  3. Mitochondria
  4. Chloroplast

Answer: 2. Lysosome

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Question 2. The scientist who saw the living cell for the fist time was

  1. Leeuwenhoek
  2. M.J. Schleiden
  3. Kolliker
  4. Palade

Answer: 1. Leeuwenhoek

Question 3. Who proposed the cell theory 

  1. Schleiden and Schwann
  2. Watson and Crick
  3. Darwin and Wallace
  4. Mendel and Morgan

Answer: 1. Schleiden and Schwann

Question 4. According to widely accepted “Fluid mosaic model” cell membranes are semi-flid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modifid in several represents. In this regard, which ofthe following statements is incorrect

  1. Proteins in cell membranes can travel with in the lipid bilayer
  2. Proteins can also undergo flp-flp movements in the lipid bilayer
  3. Proteins can remain confied within certain domains of the membrane
  4. Many proteins remain completely embedded within the bilayer.

Answer: 2. Proteins can also undergo flp-flp movements in the lipid bilayer

Question 5. Which of the following organelles does not have membrane?

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

Answer: 1. Ribosome

Question 6. Which of the following organelles would not be found in a plant cell?

  1. Chloroplast
  2. DNA
  3. Food vacuole
  4. Cell membrane

Answer: 3. Food vacuole

Question 7. Plastid that are white in colour (pigment free)

  1. Chloroplast
  2. Lysosome
  3. Leucoplast
  4. Chromoplast

Answer: 3. Leucoplast

Question 8. Which of the following is called ‘suicidal bags’

  1. Centrosomes
  2. Lysosomes
  3. Microsomes
  4. Mesosomes

Answer: 2. Lysosomes

Question 9. Plant cell wall is mainly composed of

  1. Sugars
  2. Cellulose
  3. Proteins
  4. Lipids

Answer: 2. Cellulose

Question 10. The nucleus was discovered by

  1. Robert Brown
  2. Robert Hooke
  3. A.V. leeuwenhock
  4. Schwaan

Answer: 1. Robert Brown

Question 11. In the mitochondrion energy is stored in the form of

  1. Adenosine Triphosphate (Atp)
  2. Adenosine Monophosphate (Amp)
  3. Citric Acid
  4. Adenosine diphosphate (ADP)

Answer: 1. Adenosine Triphosphate (Atp)

Question 12. The site of protein synthesis in plants is the

  1. Chloroplast
  2. Ribosomes
  3. Lysosome
  4. Mitochondria

Answer: 2. Ribosomes

Question 13. The plasma membrane is

  1. Permeable
  2. Semipermeable
  3. Differentially Permeable
  4. Impermeable

Answer: 3. Differentially Permeable

Question 14. The infoldings of the inner membrane of mitochondria is referred to as

  1. Grana
  2. Stroma
  3. Oxysome
  4. Cristae

Answer: 4. Cristae

Question 15. When a plant cell is treated by cellulose and pectinate enzymes, which of the following is formed?

  1. Chloroplast
  2. Leucoplast
  3. Protoplast
  4. One of these

Answer: 4. One of these

Question 16. The golgi bodies are related to

  1. Respiration
  2. Excretion
  3. Secretion
  4. Circulation

Answer: 3. Secretion

Question 17. Rough endoplasmic reticulum is concerned with

  1. Protein synthesis
  2. Fat synthesis
  3. Respiration
  4. Photosynthesis

Answer: 1. Protein synthesis

Question 18. Which animal cell structure is characterized by selective permeability?

  1. Chromosome
  2. Cell membrane
  3. Cell wall
  4. Ribosomes

Answer: 1. Chromosome

Question 19. The most abundant compound in cytoplasm is

  1. Fat
  2. Water
  3. Protein
  4. Carbohydrates

Answer: Protein

Question 20. Which organelle is usually found associated with the nucleus of the cell in animals?

  1. Centrosome
  2. Vacuole
  3. Chromosome
  4. Mitochondrion

Answer: 1. Centrosome

Question 21. The smallest organelle in the cell is

  1. Lysosome
  2. Ribosome
  3. Mitochondria
  4. Peroxisome

Answer: 1. Lysosome

Question 22. The dictum – “Omnis cellula a cellula” was proposed by:

  1. Schwann
  2. Virchow
  3. Schleiden
  4. Robert brown

Answer: 2. Virchow

Question 23. Cynobacteria have

  1. A well-defied nucleus and chloroplast
  2. A well-defied nucleus but no chloroplast
  3. Incipient nucleus and vesicles containing chlorophyll.
  4. Incipient nucleus but no chloroplast or pigment.

Answer: 3. Incipient nucleus and vesicles containing chlorophyll.

Question 24. Which of the following statements about the plasma membrane is true?

  1. It is a solid layer of protein that protects the contents of the cell.
  2. The plasma membrane of a bacterium has none of the same components as the plasma membrane of an animal cell.
  3. It is a rigid and unmoving layer of phospholipids and proteins.
  4. It allows selected molecules to pass into and out of the cell.

Answer: 4. It allows selected molecules to pass into and out of the cell.

Question 25. One key function of nuclear pores is to

  1. Allow Cells To Communicate With One Another.
  2. Aid In The Production Of New Nuclei.
  3. Allow Molecules Such As Proteins To Move Into And Out Of The Nucleus.
  4. Form connections between different organelles.

Answer: 3. Allow Molecules Such As Proteins To Move Into And Out Of The Nucleus.

Question 26. Vesicles are essential for the normal functioning of the Golgi apparatus because

  1. They Provide Energy For Chemical Reactions.
  2. They Move Proteins And Lipids Between Different Parts Of The Organelle.
  3. They Contribute To The Structural Integrity Of The Organelle.
  4. They produce the sugars that are added to proteins.

Answer: 1. They Provide Energy For Chemical Reactions.

Question 27. Which of the following statements is not true 

  1. Both mitochondria and chloroplasts provide energy to cells in the same way.
  2. Both mitochondria and chloroplasts have more than one membrane.
  3. Only chloroplasts contain the pigment chlorophyll.
  4. Both animal and plant cells contain mitochondria.

Answer: 1. Both mitochondria and chloroplasts provide energy to cells in the same way.

Question 28. The thickness of plasma membrane (unit membrane) is –

  1. 75 Å
  2. 100 Å
  3. 125 Å
  4. 150 Å

Answer: 1. 75 Å

Question 29. Cellular respiration is related to ………. as ……… is to chloroplasts.

  1. Nucleus; Cytoplasm
  2. Mitochondria; Photosynthesis
  3. Atp; Light
  4. Grana; cristae

Answer: 4. Grana; cristae

Question 30. Which of the followings does best describe the structure of the plasma membrane?

  1. Proteins Sandwiched Between Two Layers Of Phospholipid
  2. Proteins Embedded In Two Layers Of Phospholipid
  3. A Layer Of Protein Coating A Layer Of Phospholipid
  4. Phospholipids Embedded In Two Layers Of Protein

Answer: 2. Proteins Embedded In Two Layers Of Phospholipid

Question 31. The total solute concentration in a red blood cell is about 2%. Sucrose cannot pass through the membrane, but water and urea can. Osmosis would cause such a cell to shrink the most when the cell is immersed in which of the following 

  1. A Hypertonic Sucrose Solution
  2. A Hypotonic Sucrose Solution
  3. A Hypertonic Urea Solution
  4. A Hypotonic Urea Solution

Answer: 1. A Hypertonic Sucrose Solution

Question 32. What process does link reception of cell signals to responses within the cell?

  1. A Signal Transduction Pathway
  2. Protein Synthesis By Ribosomes
  3. Budding Of Transport Vesicles From The Golgi
  4. Active transport of the signal into the cell

Answer: A Signal Transduction Pathway

Question 33. If an animal cell is placed into a Solution whose concentration of dissolved substances is higher than that inside the cell

  1. The Cell Will Swell
  2. The Cell Will Shrivel
  3. The Solution Is Described As Hypertonic
  4. Both 2 and 3 are correct

Answer: 4. Both 2 and 3 are correct

Question 34. Which of the following processes does cause substances to move across membranes without the expenditure of cellular energy?

  1. Endocytosis
  2. Exocytosis
  3. Active transport
  4. Diffusion

Answer: 4. Diffusion

Question 35. The outermost boundary of an animal cell is the

  1. Plasma Membrane
  2. Nucleus
  3. Cytoplasm
  4. Cytoskeleton

Answer: 1. Plasma Membrane

Question 36. A series of membrane-enclosed channels studded with ribosomes are called

  1. Lysosomes
  2. Golgi Complex
  3. Rough Endoplasmic Reticulum
  4. Mitochondria

Answer: 3. Rough Endoplasmic Reticulum

Question 37. A temporary mount of a tissue is made in

  1. Wax
  2. Alcohol
  3. Glycerine
  4. Xylene

Answer: 3. Glycerine

Question 38. The rough endoplasmic reticulum owes its rough surface to

  1. Mitochondria
  2. Proteins
  3. Ribosomes
  4. DNA particles

Answer: 3. Ribosomes

Question 39. The energy necessary for active transport across cytoplasmic membranes is believed to come from

  1. ATP
  2. Diffusion
  3. Osmosis
  4. Kinetic energy

Answer: 1. ATP

Question 40. Transport proteins are required for

  1. Diffusion
  2. Osmosis
  3. Facilitated Transport
  4. Facilitated transport and active transport

Answer: 1. Diffusion

Question 41. Cells were determined to be the basic structural units of plants and animals in which century

  1. 1600’s
  2. 1700’s
  3. 1800’s
  4. 1900’s

Answer: 3. 1800’s

Question 42. Which organelle is made up of flt, membrane-enclosed sacs and functions as a processing center?

  1. Chloroplast
  2. Smooth endoplasmic reticulum
  3. Rough endoplasmic reticulum
  4. Golgi body

Answer: 4. Golgi body

Question 43. The cell’s “garbage disposals” are the

  1. Lysosomes
  2. Peroxisomes
  3. Mitochondria
  4. Vacuoles

Answer: 1. Lysosomes

Question 44. The organelles that help the cell use oxygen, and also contain a variety of enzymes that help the cell degrade rare biochemicals, among other things, are the

  1. Lysosomes
  2. Peroxisomes
  3. Mitochondria
  4. Vacuoles

Answer: 2. Peroxisomes

Question 45. Choose the best defiition of’diffusion’.

  1. Passive movement from an area of greater concentration to one of lesser concentration.
  2. Active movement from an area of greater concentration to one of lesser concentration.
  3. Passive movement from an area of lesser concentration to one of greater concentration.
  4. Active movement from an are of lesser concentration to one of greater concentration.

Answer: 1. Passive movement from an area of greater concentration to one of lesser concentration.

Question 46. If a red blood cell (interior concentration of 0.9% salt) was placed into a test tube of 10% salt, what would happen to the red blood cell?

  1. It would fill with water and burst.
  2. Nothing – the Solution is isotonic to the interior of the red blood cell.
  3. The red blood cell would shrink as it loses water to the salt Answer: in the test tube.
  4. None of these

Answer: 3. The red blood cell would shrink as it loses water to the salt Solution in the test tube.

Question 47. Cell to cell contact in plant cells is maintained through

  1. Tight Junctions
  2. Desmosomes
  3. Interdigitations
  4. Plasmodesmata

Answer: 4. Plasmodesmata

Question 48. What part of the cell does serves as the intracellular highway?

  1. Endoplasmic reticulum
  2. Golgi apparatus
  3. Cell membrane
  4. Mitochondria

Answer: 1. Endoplasmic reticulum

Question 49. Which of the following is found in plant cells, but not animal cells?

  1. Cell wall
  2. Nucleus
  3. Endoplasmic reticulum
  4. Mitochondria

Answer: 1. Cell wall

Question 50. The diffusion of water from external Answer: into dry raisins is called

  1. Exosmosis
  2. Endosmosis
  3. Imbibition
  4. Plasmolysis

Answer: 2. Endosmosis

Question 51. Where are ribosomes usually located in animal and plant cells?

  1. Inside The Nucleus
  2. Near The Cell Membrane
  3. On The Endoplasmic Reticulum
  4. Inside the vacuole

Answer: 3. On The Endoplasmic Reticulum

Question 52. What part of the cell does serve to process, package and export proteins ?

  1. Mitochondria
  2. Endoplasmic reticulum
  3. Nucleolus
  4. Golgi apparatus

Answer: 4. Golgi apparatus

Question 53. Which of the following could be found in BOTH the nucleus and the cytoplasm?

  1. Nucleolus
  2. Ribosomes
  3. RNA
  4. Both RNA & ribosomes

Answer: 4. Both RNA & ribosomes

Question 54. Which of the following structures has a 9 + 2 arrangement?

  1. Flagella
  2. Ribosome
  3. Mitochondria
  4. Golgi apparatus

Answer: 1. Flagella

Question 55. In the eukaryotic cell which one of the following is not a membranous compartment?

  1. Nucleus
  2. Ribosome
  3. Vacuole
  4. Lysosome

Answer: 2. Ribosome

Question 56. The cell nucleus was discovered by

  1. Robert Hooke
  2. Robert Brown
  3. De Duve
  4. Virchow

Answer: 2. Robert Brown

Question 57. Which of the following help in cell wall formation?

  1. Nucleus
  2. Golgi complex
  3. Nucleolus
  4. Endoplasmic reticulum

Answer: 2. Golgi complex

Question 58. Mitochondria are not found in

  1. Human Rbc
  2. Human Liver Cell
  3. Human Nerve Cell
  4. Frog liver cell

Answer: 1. Human Rbc

Question 59. Chromosomes contain hereditary units called

  1. Genes
  2. Ribosomes
  3. DNA
  4. RNA

Answer: 1. Genes

Question 60. Protoplasm is

  1. True Solution
  2. Suspension
  3. Colloidal Solution
  4. None of the above

Answer: 3. Colloidal Solution

Question 61. The physical basis of life is

  1. Ectoplasm
  2. Protoplasm
  3. Nucleoplasm
  4. Endoplasm

Answer: 2. Protoplasm

Question 62. Cell vacuole contains

  1. Water
  2. Cytoplasm
  3. Dissolved Substances
  4. Water and metabolic wastes

Answer: 3. Dissolved Substances

Question 63. Which of the cell organelle takes part in the formation of acrosome?

  1. Nucleus
  2. Chromosome
  3. Golgi complex
  4. Mitochondria

Answer: 3. Golgi complex

Question 64. Lipid molecules in the cell are synthesised by

  1. Smooth Endoplasmic Reticulum
  2. Rough Endoplasmic Reticulum
  3. Golgi Apparatus
  4. Plastids

Answer: 1. Smooth Endoplasmic Reticulum

Question 65. Which out of the following is not a function of vacuole?

  1. Storage
  2. Providing turgidity and rigidity to the cell
  3. Waste excretion
  4. Locomotion

Answer: 4. Locomotion

Question 66. 1 µm is

  1. 10–6 m
  2. 10–9 m
  3. 10–10 m
  4. 10–3 m

Answer: 1. 10–6 m

Question 67. Which cell organelle plays a crucial role in detoxifying many poisons and drugs in a cell?

  1. Golgi apparatus
  2. Lysosomes
  3. Smooth endoplasmic reticulum
  4. Vacuoles

Answer: 3. Smooth endoplasmic reticulum

Question 68. Which of the following can be made into crystal?

  1. A bacteium
  2. An amoeba
  3. A virus
  4. A sperm

Answer: 1. A bacteium

Question 69. Silver nitrate Answer: is used to study

  1. Endoplasmic Reticulum
  2. Golgi Apparatus
  3. Nucleus
  4. Mitochondria

Answer: 2. Golgi Apparatus

Question 70. The cell organelle involved in forming complex sugar from simple sugars are

  1. Endoplasmic Reticulum
  2. Ribosomes
  3. Plastids
  4. Golgi apparatus

Answer: 4. Golgi apparatus

Question 71. Human cheek cells are commonly stained with

  1. Methylene Blue
  2. Safranin
  3. Acetocarmine
  4. Eosine

Answer: 1. Methylene Blue

Question 72. Name the stain which is commonly used to study plant cells

  1. Methylene blue
  2. Cotton blue
  3. Safranin
  4. Acetocarmine

Answer: 3. Safranin

Question 73. Cells are fist focussed in microscope under

  1. 40 X
  2. 10 X
  3. 100 X
  4. Any of these

Answer: 2. 10 X

Question 74. Coverslip is put on the mounted material on a slide very gently to

  1. Avoid The Crushing Of Mounted Material
  2. Avoid The Entry Of Air Bubbles
  3. Avoid Oozing Of Stain
  4. Avoid oozing of glycerine

Answer: 2. Avoid The Entry Of Air Bubbles

Question 75. Raisins are soaked in water for determining the percentage of water absorbed by raisins. The formula, used by a student, for calculating the percentage of water absorbed, is

  1. \(\frac{\text { Initial weight }- \text { Final weight }}{\text { Initial weight }} \times 100\)
  2. \(\frac{\text { Final weight }- \text { Initial weight }}{\text { Initial weight }} \times 100\)
  3. \(\frac{\text { Final weight }- \text { Initial weight }}{\text { Final weight }} \times 100\)
  4. \(\frac{\text { Initial weight }- \text { Final weight }}{\text { Final weight }} \times 100\)

Answer: 2.  \(\frac{\text { Final weight }- \text { Initial weight }}{\text { Initial weight }} \times 100\)

Question 76. Iodine gives blue-black colour with

  1. Protein
  2. Oil
  3. Starch
  4. Sucrose

Answer: 3. Starch

Question 77. Root hairs absorb water from soil through

  1. Diffusion
  2. Imbibition
  3. Osmosis
  4. All the above

Answer: 3. Osmosis

Question 78. Mitochondria are the seat of

  1. Kreb’s cycle
  2. Calvin cycle
  3. Anaerobic Respiration
  4. Trapping of sun light

Answer: 1. Kreb’s cycle

Question 79. Which of the following is incorrect pair?

  1. Nucleus-Brain of the cell
  2. Mitochondria-Power house of the cell
  3. Chloroplast-Kitchen of the cell
  4. Lysosome-Secretory granules

Answer: 4. Lysosome-Secretory granules

Question 80. Amoeba acquires its food through a process, termed

  1. Exocytosis
  2. Endocytosis
  3. Plasmolysis
  4. Exocytosis and endocytosis both

Answer: Endocytosis

Question 81. Which one of the followings cell-wall is not made up of cellulose?

  1. Bacteria
  2. Hydrilla
  3. Mango tree
  4. Cactus

Answer: 1. Bacteria

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