CBSE Class 11 Respiration in Plants Worksheet A

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MULTIPLE CHOICE QUESTIONS

Question. Anaerobic respiration, after glycolysis is also called as 
(a) fermentation
(b) fragmentation
(c) restoration
(d) multiplication
Answer. A

Question. Pyruvate kinase enzyme catalyses 
(a) first irreversible step of glycolysis
(b) second irreversible step of glycolysis
(c) third irreversible step of glycolysis
(d) fourth irreversible step of glycolysis
Answer. C

Question. Which of the metabolites is common to respiration mediated breakdown of fats, carbohydrates and proteins? 
(a) Fructose 1, 6 - bisphosphate
(b) Pyruvic acid
(c) Acetyl CoA
(d) Glucose - 6 - phosphate
Answer. C

Question. Refer the figure and answer the question.

Choose the correct names of P, Q, R, and S.

Answer. D

Question. By which of the following complex, proton is pumped to reach ATP synthase to participate in ATP synthesis?
(a) Cytochrome b6f
(b) Cytochrome c oxidase
(c) Cytochrome a - a3
(d) Cytochrome bc
Answer. A

Question. Which of the following statements (i to v) regarding glycolysis are correct.
(i) It is ten enzymatic reactions that convert a six-carbon molecule to a three carbon pyruvate and result in a net gain of 2 ATP molecules.
(ii) Glucose undergoes partial oxidation to form one molecule of pyruvic acid.
(iii) Glucose is phosphorylated to give rise to glucose - 6 - phosphate by the activity of the enzyme phosphofructokinase.
(iv) The scheme of glycolysis was given by Gustav Embden, Otto Morrison, and J. Parnas and is often referred to as the EMP pathway.
(v) ATP is utilized at two steps: first in the conversion of glucose into glucose 6- phosphate & second in the conversion of fructose - 6- phosphate to fructose 1, 6-disphosphate. 
(a) (i), (iv) and (v)
(b) (iii) and (v)
(c) (iv) and (v)
(d) (ii) and (iv)
Answer. A

Question. Refer the given equation and answer the question.
2(C₅₁H₉₈O₆ )+ 145O₂ →102CO₂ + 98H₂ O + Energy
The R.Q of above reaction is 
(a) 1
(b) 0.7
(c) 1.45
(d) 1.62
Answer. B

Question. In alcoholic fermentation, NAD⁺ is produced during the
(a) reduction of acetyldehyde to ethanol.
(b) oxidation of glucose.
(c) oxidation of pyruvate to acetyl coA.
(d) hydrolysis of ATP to ADP.
Answer. A

ASSERTION REASON QUESTIONS

Directions : These questions consist of two statements, each printed as Assertion and Reason.While answering these questions, you are required to choose any one of the following five responses.
(a) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
(b) If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
(c) If the Assertion is correct but Reason is incorrect.
(d) If both the Assertion and Reason are incorrect.
(e) If the Assertion is incorrect but the Reason is correct.

Question. Assertion : Stomata are absent in submerged hydrophytes.
Reason : Respiration occurs by means of air chambers in submerged plants. 
Answer. B

Directions : Each of these questions contains an Assertion followed by Reason. Read them carefully and answer the question on the basis of following options. You have to select the one that best describes the two statements.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
(c) If Assertion is correct but Reason is incorrect.
(d) If both the Assertion and Reason are incorrect.

Question. Assertion : Glycolysis is the first step of respiration in which glucose completely breaks into CO2 and H2O.
Reason : In this process, there is net gain of twenty four molecules of ATP. 
Answer. D

Question. Assertion : The inner membrane of mitochondria contains systems involving electron transport.
Reason : The mitochondrial matrix contains enzymes of Kreb's cycle. 
Answer. B

Question. Assertion : Glycolysis occurs in cytoplasm.
Reason : Enzymes for glycolysis are found in cytoplasm. It is common in aerobic/anaerobic respiration.
Answer. A

1. Define fermentation and aerobic respiration.

2. What are the different types of respiration occurs in plants?

3. Name the energy currency of the cells.

4. Define RQ. What is its value for fats?

5. What is the importance of F₀-F₁ particles in ATP production during aerobic Respiration?

6. What is oxidative decarboxylation? What happens to pyruvate immediately after this reaction?

7. Describe the mechanism of Respiration.

8. What are the various steps involved in glycolysis?

9. Describe the process and role of citric acid cycle in living organisms.

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