Assertion (A): C₄ plants show little or no photorespiration.
Reason (R): Decarboxylation of C₄ acids raises the CO₂ concentration around RuBisCO, so it acts mainly as a carboxylase.

(a) Both A and R are true, and R is the correct explanation of A. Correct
(b) Both A and R are true, but R is not the correct explanation of A. Your answer
(c) A is true but R is false. Your answer
(d) Both A and R are false. Your answer

Your answer: Correct answer: (a)

Explanation

Why (a) is correct

Both are true and R explains A. Decarboxylation of C₄ acids raises CO₂ around RuBisCO in the bundle sheath, so RuBisCO acts mainly as a carboxylase and photorespiration is minimised.

Why the other options are wrong

(b) · your answer R is the reason for A.
(c) · your answer R is true.
(d) · your answer Both are true.

NCERT point: This is the CO₂-concentrating mechanism of C₄ plants.

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Assertion (A): C4 plants show little or no photorespiration.Reason (R): Decarboxylation of C4 acids raises the CO2 concentration around RuBisCO, so it acts mainly as a carboxylase.

Explanation

Why (a) is correct

Why the other options are wrong

Similar questions

Assertion (A): C₄ plants show little or no photorespiration.
Reason (R): Decarboxylation of C₄ acids raises the CO₂ concentration around RuBisCO, so it acts mainly as a carboxylase.