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Plasmodesmata between mesophyll and bundle sheath cells in C4 plants are needed for

  • (a) exchange of whole chloroplasts between cells Your answer
  • (b) movement of C4 and C3 acids between the cells Correct
  • (c) exchange of RuBisCO between the two cells Your answer
  • (d) movement of light energy between the cells Your answer
Your answer: Correct answer: (b)
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Explanation

Why (b) is correct

The C4 acids move from the mesophyll to the bundle sheath, and the 3-carbon acid moves back. These connections (plasmodesmata) allow this movement between the cells.

Why the other options are wrong

  • (a) · your answer Chloroplasts do not move between cells.
  • (c) · your answer RuBisCO stays in the bundle sheath cells.
  • (d) · your answer Light energy is not transferred between cells.
NCERT point: The C4 pathway needs two cell types to work together.
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