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Bundle sheath cells in C4 plants

  • (a) are rich in RuBisCO Correct
  • (b) lack RuBisCO Your answer
  • (c) are rich in PEP carboxylase Your answer
  • (d) lack both RuBisCO and PEP carboxylase Your answer
Your answer: Correct answer: (a)
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Explanation

Why (a) is correct

In C4 plants, RuBisCO is present in the bundle sheath cells, where the Calvin cycle runs. The bundle sheath lacks PEP carboxylase, which is in the mesophyll.

Why the other options are wrong

  • (b) · your answer The bundle sheath is where RuBisCO is found in C4 plants.
  • (c) · your answer PEP carboxylase is in the mesophyll cells, not the bundle sheath.
  • (d) · your answer Bundle sheath cells do have RuBisCO.
NCERT point: The C4 pathway concentrates CO2 around RuBisCO in the bundle sheath, so photorespiration is avoided.
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