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Photosynthesis in Higher Plants
Question
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The carboxylating enzyme present in bundle sheath cells of maize leaves is

  • RUBP carboxylase

  • hexokinase

  • carbonic anhydrase

  • PEP-carboxylase

Answer

A.

RUBP carboxylase

Maize is a C4 -plant having distinct Kranz anatomy and two carboxylation enzymes. One is present in the mesophyll cells of chloroplasts and the other in the bundle sheath cells.

PEP- Carboxylase is present in the mesophyll cell and RUBP carboxylase is present in the bundle sheath cells.

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