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Which of the following correctly compares C3 and C4 plants?

  • (a) C3: Kranz anatomy; C4: no Kranz anatomy Your answer
  • (b) C3: first product OAA; C4: first product 3-PGA Your answer
  • (c) C3: no Calvin cycle; C4: Calvin cycle Your answer
  • (d) C3: primary acceptor RuBP; C4: primary acceptor PEP Correct
Your answer: Correct answer: (d)
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Explanation

Why (d) is correct

C3 plants use RuBP as the primary CO2 acceptor, and C4 plants use PEP.

Why the other options are wrong

  • (a) · your answer It is the reverse: C4 plants have Kranz anatomy.
  • (b) · your answer It is the reverse: C3 first product is 3-PGA; C4 is OAA.
  • (c) · your answer Both C3 and C4 plants have the Calvin cycle.
NCERT point: C3: RuBP + RuBisCO. C4: PEP + PEPcase first.
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