NEET 2023 Phase 2 · BiologyEnzymesPrevious Year Question
Given below are two statements: Statement I: RuBisCO is the most abundant enzyme in the world. Statement II: Photorespiration does not occur in C4 plants. In the light of the above statements, choose the most appropriate answer from the options given below:
Answer: (A) Both Statement I and Statement II are correct. Answer: (A) Both Statement I and Statement II are correct.
- A.Both Statement I and Statement II are correct✓
- B.Both Statement I and Statement II are incorrect
- C.Statement I is correct but Statement II is incorrect
- D.Statement I is incorrect but Statement II is correct
Correct Answer
(A) Both Statement I and Statement II are correct
Solution & Explanation
Answer: (A) Both Statement I and Statement II are correct. Solution: Statement I is an explicit NCERT fact — RuBisCO (Ribulose bisphosphate Carboxylase-Oxygenase) is the most abundant protein/enzyme in the whole biosphere. Statement II is correct — C4 plants concentrate CO2 at the site of RuBisCO and so do not show (significant) photorespiration. Hence both statements are correct. NCERT Reference: Ch 9, p.110, line ~28 — "Ribulose bisphosphate Carboxylase-Oxygenase (RuBisCO) is the most abundant protein in the whole of the biosphere."
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