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The correct sequence of cell organelles involved in photorespiration is

  • (a) chloroplast, rough endoplasmic reticulum, dictyosomes Your answer
  • (b) chloroplast, vacuole, peroxisome Your answer
  • (c) chloroplast, peroxisome, mitochondria Correct
  • (d) chloroplast, Golgi bodies, mitochondria Your answer
Your answer: Correct answer: (c)
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Explanation

Why (c) is correct

Photorespiration involves three organelles in order: the chloroplast (RuBP is oxygenated), the peroxisome (glycolate is oxidised) and the mitochondrion (CO2 is released).

Why the other options are wrong

  • (a) · your answer The endoplasmic reticulum and dictyosomes are not part of photorespiration.
  • (b) · your answer The vacuole is not involved; the third organelle is the mitochondrion.
  • (d) · your answer Golgi bodies are not involved; the peroxisome is.
NCERT point: Photorespiration produces neither ATP nor sugar; it releases CO2.
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