Respiration In Plants Multiple Choice Question And Answers

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Respiration In Plants Multiple Choice Questions

Question 1. Which statement is wrong for the Krebs cycle?

  1. There is one point in the cycle where FAD+ is reduced to FADH2
  2. During the conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesized
  3. The cycle starts with the condensation of the acetyl group (acetyl CoA) with pyruvic acid to yield citric acid
  4. There are three points in the cycle where NAD+ is reduced to NADH + H+

Answer: 4. There are three points in the cycle where NAD+ is reduced to NADH + H+

Question 2. Oxidative phosphorylation is

  1. Formation of ATP by transfer of phosphate group from a substrate to ADP
  2. Oxidation of phosphate group in ATP
  3. Addition of phosphate group to ATP
  4. Formation of ATP by energy released from electrons removed during substrate oxidation

Answer: 1. Formation of ATP by transfer of phosphate group from a substrate to ADP

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Question 3. Which of the following biomolecules is common to the respiration-mediated breakdown of fats carbohydrates and proteins?

  1. Glucose 6-phosphate
  2. Fructose 1,6-bisphosphate
  3. Pyruvic acid
  4. Acetyl CoA

Answer: 4. Acetyl CoA

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Question 4. In which one of the following processes CO2 is not released?

  1. Aerobic respiration in plants
  2. Aerobic respiration in animals
  3. Alcoholic fermentation
  4. Lactate fermentation

Answer: 4. Lactate fermentation

Respiration In Plants Multiple Choice Question And Answers

Question 5. There are three major ways in which different cells handle pyruvic acid produced by glycolysis. These are–

  1. Lactic acid fermentation, alcoholic fermentation, aerobic respiration
  2. Oxaloacetic acid fermentation, lactic acid
    fermentation, aerobic respiration
  3. Alcoholic fermentation, oxaloacetic acid fermentation, citric acid fermentation
  4. Citric Acid fermentation, lactic acid fermentation, alcoholic fermentation

Answer: 1. Lactic acid fermentation, alcoholic fermentation, aerobic respiration

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Question 6. The Respiratory Quotient (RQ) of glucose is—

  1. 0.5
  2. 0.7
  3. 1.0
  4. 1.5

Answer: 3. 1.0

Question 7. How much ATP is produced when 1 molecule of FADH2 is oxidized to FAD through an electron transport system?

  1. 2
  2. 3
  3. 1
  4. 4

Answer: 1. 2

Question 8. Out of 38 molecules of ATP produced upon aerobic respiration of glucose, the break up of ATP production in glycolysis (P), pyruvate to acetyl CoA formation (Q), and Krebs cycle (R) is as follows

  1. P=1,Q=6, R= 30
  2. P=8,Q=6, R= 24
  3. P=8,Q=10, R= 20
  4. P=2,Q=12, R=24

Answer: 4. P=2,Q=12, R=24

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Question 9. How many NAD molecules get reduced in complete oxidation of one glucose molecule?

  1. 2
  2. 5
  3. 10
  4. 12

Answer: 1. 2

Question 10. Acetylation of pyruvate takes place in the—

  1. Perimitochondrial space
  2. Mitochondrial matrix
  3. Cristae
  4. F particles

Answer: 2. Mitochondrial matrix

Question 11. Enzyme enolase catalyzes the conversion of 2PGA to phosphoenol pyruvic acid in the presence of which is the cofactor.

  1. Mn2+
  2. Fe2+
  3. Mg2+
  4. Zn2+

Answer: 3. Mg2+

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Question 12. When the respiratory quotient is less than 1.0 in respiratory metabolism, it means that—

  1. Carbohydrates are Used As Respiratory Substrate
  2. The volume of carbon dioxide evolved is less than the volume of oxygen consumed
  3. The volume of carbon dioxide evolved is more than the volume of oxygen consumed
  4. The volume of carbon dioxide evolved is equal to the volume of oxygen consumed

Answer: 4. Volume of carbon dioxide evolved is equal to the volume of oxygen consumed

respiration in plants

Question 13. A small protein attached to the outer surface of the inner membrane and which acts as a mobile carrier for the transfer of electrons between complex 3 and 4 is

  1. Cytochrome-D
  2. Cytochrome-B
  3. Cytochrome-C
  4. Cytochrome-A

Answer: 2. Cytochrome-B

Question 14. During glycolysis, fructose 1,6-bisphosphate is split into

  1. Dihydroxyacetone phosphate and 2-phosphoglyceraldehyde
  2. Dihydroxyacetone phosphate and1-phosphoglyceraldehyde
  3. Dihydroxyacetone phosphate and 2-phosphoglycerate
  4. Dihydroxyacetone phosphate and 3-phosphoglyceraldehyde

Answer: 4. Dihydroxyacetone phosphate and 3-phosphoglyceraldehyde

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Question 15. Assertion (A): The RQ value of fats is less than one. Reason (R): The amount of CO2 released is less than the O2 consumed when fats are used in respiration

  1. Both A and R are correct and R is the correct explanation of A.
  2. Both A and R are correct and R is not the correct explanation of A.
  3. A is correct R is incorrect
  4. A is incorrect R is correct

Answer: 1. Both A and R are correct and R is the correct explanation of A.

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Question 16. In which of the following steps of the citric acid cycle CO2 is evolved?

  1. Citric acid→or-ketoglutarate
  2. Succinic acid →Malic acid
  3. Malic acid →Oxaloacetic acid
  4. α-ketoglutaric acid → Succinyl CoA

Choose the correct answer

  1. 1 and 2
  2. 2 and 3
  3. 3 and 4
  4. 1 and 4
  5. 2 and 4

Answer: 2. 2 and 3

Question 17. Match the organic compounds listed under column I with the explanations given under column II. Choose the appropriate option from the given choices.

Respiration In Plants Phosphenol Pyruvate

  1. 1-3, 2 – 4, 3-5, 4-1
  2. 1-2, 2 —3, 3 — 4,4— 5
  3. 1 — 5, 2-4,3-3, 4-2
  4. 1—5,2-1, 3-2,4-3

Answer: 3. 1 — 5, 2-4,3-3, 4-2

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Question 18. Oxidative decarboxylation of pyruvic acid results in the formation of

  1. Acetyl CoA
  2. CO2
  3. Atp
  4. NADH+H+

Choose the correct answer

  1. Only 1
  2. 1 and 2
  3. 1,2 and 3
  4. 1,2, and 4
  5. 3 and 4

Answer: 5. 3 and 4

Question 19. Select the correct order of reactions in glycolysis—

  1. Conversion of 3-phosphoglyceraldehyde to 1,3-bisphosphoglycerate.
  2. Conversion of 3-phosphoglyceric acid to 2-phosphoglycerate.
  3. Conversion of 1,3-BPGA to 3-phosphoglyceric acid.
  4. Splitting of fructose 1,6-bisphosphate into dihydroxy acetone phosphate and 3-phosphoglyceraldehyde.

Choose the correct answer

  1. 4,3,1 and 2
  2. 2, 3, 1 and 4
  3. 4, 2, 1 and 3
  4. 1, 4, 3 and 2
  5. 4, 1, 3 and 2

Answer: 5. 4, 1, 3 and 2

Question 20. Oxygen content reduction makes the glycolysis (glycogenesis) intensity increase due to

  1. Increase of ADP concentration in cell
  2. Increase of NAD+ concentration in cell
  3. Increase of ATP concentration in cell
  4. Increase in concentration of peroxides and free radicals

Answer: 1. Increase of ADP concentration in cell

Question 21. The process by which ATP is produced in the inner membrane of a mitochondrion. The electron transport system transfers protons from the inner compartment to the outer as the protons flow back to the inner compartment; the energy of their movement is used to add phosphate to ADP, forming ATP.

  1. Chemiosmosis
  2. Phosphorylation
  3. Glycolysis
  4. Fermentation

Answer: 1. Chemiosmosis

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Question 22. Biological oxidation in the Krebs cycle involves—

  1. O2
  2. CO2
  3. O3
  4. NO2

Answer: 1. O2

Question 23. In which of the following reactions of glycolysis, oxidation takes place?

  1. Glucose 6-phosphate to fructose 6-phosphate
  2. Glyceraldehyde 3-phosphate to 1,3-diphosphoglycerate
  3. 1,3-diphosphoglycerate to 3-phosphoglycerate
  4. 2-diphosphoglycerate to phosphoglycerate

Answer: 2. Glyceraldehyde 3-phosphate to 1,3-diphosphoglycerate

Question 24. The three boxes in this diagram represent the three major biosynthetic pathways in aerobic respiration. Arrows represent net reactants or products.
Answer:

Respiration In Plants the three major biosynthetic pathways in aerobic respiration

Arrows numbered 4, 8, and 12 can all be—

  1. NADH
  2. ATP
  3. H2O
  4. FAD+ or FADH2

Answer: 2. ATP

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Question 25. Which of the metabolites is common to respiration-mediated carbohydrates and proteins?

  1. Glucose 6-phosphate
  2. Fructose 1,6-bisphosphate
  3. Pyruvic acid
  4. Acetyl CoA

Answer: 4. Acetyl CoA

Question 26. Which one of the following reactions is an example of oxidative decarboxylation?

  1. Conversion of succinate to fumarate
  2. Conversion of fumarate to malate
  3. Conversion of pyruvate to acetyl CoA
  4. Conversion of citrate to isocitrate

Answer: 3. Conversion of pyruvate to acetyl CoA

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