First slide

The C4 Pathway

Question

Choose the correct statement with respect to photosynthesis.

Moderate

A

Law of limiting factors was proposed by Arnon
B

$C_{3}$ plants are photosynthetically more efficient than $C_{4}$ plants.
C

Bundle sheath cells of $C_{4}$ plants show both decarboxylation and carboxylation.
D

Maize and Sorghum are $C_{3}$ plants.

Solution

During $C_{4}$ cycle, in bundle sheath cells, $C_{4}$ acids such as Malic acid or Aspartic acid are subjected to decarboxylation and the released ${CO}_{2}$ is accepted by RUBP to form phosphoglyceric acid. Law of limiting factors was proposed by Blackman. $C_{3}$ plants are less efficient than $C_{4}$ plants such as Maize and Sorghum.

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