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In photorespiration, CO2 is released in the

  • (a) cytoplasm Your answer
  • (b) chloroplasts Your answer
  • (c) peroxisomes Your answer
  • (d) mitochondria Correct
Your answer: Correct answer: (d)
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Explanation

Why (d) is correct

In photorespiration, two glycine molecules are converted to serine in the mitochondria, and CO2 is released there.

Why the other options are wrong

  • (a) · your answer The cytoplasm is not where the CO2 of photorespiration is released.
  • (b) · your answer In the chloroplast, RuBP is oxygenated; no CO2 is released there.
  • (c) · your answer In the peroxisome, glycolate is oxidised (O2 is used); CO2 is released later, in the mitochondria.
NCERT point: Photorespiration releases CO2 and uses ATP, but makes neither sugar nor ATP.
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