Question

Which of the following combinations of the statements about photorespiration is CORRECT? (P) Photorespiration generates no ATP
(Q) Photorespiration produces no glucose
(R) Photorespiration releases O\(_2\)
(S) Photorespiration does not occur in C\(_4\) plants

• A. P and S
• B. P and Q
• C. Q, R and S
• D. P, Q and S

Hint:

Photorespiration does not produce ATP or glucose and releases oxygen. C\(_4\) plants have evolved a mechanism to minimize photorespiration.

Answer 1

The Correct Option is B

Step 1: Understanding photorespiration.
Photorespiration is a process that occurs in plants when oxygen is used instead of carbon dioxide during photosynthesis. It does not produce ATP or glucose and results in the release of oxygen. C\(_4\) plants have a mechanism to minimize photorespiration.

Step 2: Analyzing the options.
- (P) Photorespiration generates no ATP: This is correct. Photorespiration does not generate ATP but instead consumes energy.
- (Q) Photorespiration produces no glucose: This is correct. Photorespiration does not result in the production of glucose.
- (R) Photorespiration releases O\(_2\): This is correct. Photorespiration involves the release of oxygen.
- (S) Photorespiration does not occur in C\(_4\) plants: This is correct. C\(_4\) plants have a specialized mechanism to avoid photorespiration by concentrating CO\(_2\) in the bundle sheath cells.

Final Answer: \[ \boxed{\text{(D) P, Q and S.}} \]