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Which one of the following is wrong about photorespiration?

  • (a) It is a characteristic of C3 plants. Your answer
  • (b) It occurs in the daytime only. Your answer
  • (c) It occurs in chloroplasts. Your answer
  • (d) It is a characteristic of C4 plants. Correct
Your answer: Correct answer: (d)
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Explanation

Why (d) is correct

Photorespiration is a feature of C3 plants, not C4 plants, so statement (d) is wrong. C4 plants avoid photorespiration.

Why the other options are wrong

  • (a) · your answer This is correct: C3 plants carry out photorespiration.
  • (b) · your answer This is correct: photorespiration needs light-driven RuBisCO activity, so it happens in the daytime.
  • (c) · your answer This is correct: photorespiration begins in the chloroplast (and continues in peroxisomes and mitochondria).
NCERT point: Photorespiration is wasteful: no sugar and no ATP are made.
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