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Photorespiration is called wasteful because

  • (a) it fixes too much CO2 into phosphoglycolate Your answer
  • (b) it makes extra NADPH that cannot be stored Your answer
  • (c) it uses ATP and releases CO2 without making sugar Correct
  • (d) it produces too much ATP for the cell to use Your answer
Your answer: Correct answer: (c)
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Explanation

Why (c) is correct

Photorespiration uses ATP, releases CO2, and makes no sugar and no ATP. So fixed carbon and energy are lost.

Why the other options are wrong

  • (a) · your answer Photorespiration does not fix CO2; it releases it.
  • (b) · your answer It does not make extra NADPH.
  • (d) · your answer It does not make ATP; it uses ATP.
NCERT point: C4 plants avoid this loss.
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