Class NEET 2026 ALL Q #2015
COMPETENCY BASED
APPLY
4 Marks 2026 NTA-RE-NEET-2026 MCQ SINGLE
Which of the following statements regarding photorespiration are correct? (a) Do not occur in $C_{3}$ plants (b) $CO_{2}$ is consumed and $O_{2}$ is generated (c) Phosphoglycolate is formed (d) No synthesis of ATP and NADPH. Choose the correct answer from the options given below:
(A) (a) and (b) only
(B) (a) and (d) only
(C) (c) and (d) only
(D) (b) and (d) only
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Correct Answer: C

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Detailed Solution

Step 1: Analyze Statement (a)

Photorespiration is a characteristic feature of C3 plants because the enzyme RuBisCO acts as an oxygenase when O2 concentration is high. Therefore, statement (a) is incorrect.

Step 2: Analyze Statement (b)

In photorespiration, O2 is consumed and CO2 is released (not generated as a substrate). Therefore, statement (b) is incorrect.

Step 3: Analyze Statement (c)

When RuBisCO binds with O2, it produces one molecule of 3-phosphoglycerate and one molecule of 2-phosphoglycolate. Thus, statement (c) is correct.

Step 4: Analyze Statement (d)

Photorespiration is a wasteful process that consumes energy and does not produce ATP or NADPH. Thus, statement (d) is correct.

Final Answer: (c) and (d) only

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Pedagogical Audit
Bloom's Analysis: This is an APPLY question because the student must apply knowledge of the C3 cycle and RuBisCO kinetics to evaluate specific physiological outcomes.
Knowledge Dimension: CONCEPTUAL
Justification: The question tests the understanding of the metabolic pathway of photorespiration rather than simple rote memorization of facts.
Syllabus Audit: In the context of NEET, this is classified as COMPETENCY. It requires the student to differentiate between photosynthetic and photorespiratory pathways, a core competency for the Photosynthesis in Higher Plants unit.

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