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Assertion (A): Mesophyll cells of C4 plants form oxaloacetic acid as the first product.
Reason (R): Mesophyll cells of C4 plants are rich in RuBisCO.

  • (a) Both A and R are true, and R is the correct explanation of A. Your answer
  • (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. Correct
  • (d) Both A and R are false. Your answer
Your answer: Correct answer: (c)
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Explanation

Why (c) is correct

A is true: C4 mesophyll cells form OAA first, using PEPcase. R is false: mesophyll cells of C4 plants lack RuBisCO.

Why the other options are wrong

  • (a) · your answer R is false.
  • (b) · your answer R is false.
  • (d) · your answer A is true.
NCERT point: C4 mesophyll: PEPcase, no RuBisCO.
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