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Chapter: 11th Botany : Chapter 14 : Respiration

Respiration: Important Questions

Evaluation, Multiple choice questions with answers / choose the correct answer with answers, Book back 1 mark questions and answers, Answer the question

Plant Physiology (Functional Organisation)





1. The number of ATP molecules formed by complete oxidation of one molecule of pyruvic acid is

a. 12

b. 13

c. 14

d. 15


2. During oxidation of two molecules of cytosolic NADH + H+, number of ATP

molecules produced in plants are

a. 3

b. 4

c. 6

d. 8


3. The compound which links glycolysis and Krebs cycle is

a. succinic acid

b. pyruvic acid

c. acetyl CoA

d. citric acid


4. Assertion (A): Oxidative phosphorylation takes place during the electron transport chain in mitochondria.

Reason (R): Succinyl CoA is phosphorylated into succinic acid by substrate phosphorylation.

a. A and R is correct. R is correct explanation of A

b. A and R is correct but R is not the correct explanation of A

c. A is correct but R is wrong

d. A and R is wrong.


5. Which of the following reaction is not involved in Krebs cycle.

a. Shifting of phosphate from 3C to 2C

b. Splitting of Fructose 1,6 bisphosphate of into two molecules 3C compounds.

c. Dephosphorylation from the substrates

d. All of these


6. What are enzymes involved in phosphorylation and dephosphorylation reactions in EMP pathway?

7. Respiratory quotient is zero in succulent plants. Why?

8. Explain the reactions taking place in mitochondrial inner membrane.

9. What is the name of alternate way of glucose breakdown? Explain the process involved in it?

10. How will you calculate net products of one sucrose molecule upon complete oxidation during aerobic respiration as per recent view?

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