First slide

The C4 Pathway

Question

C₄ plants are different from C₃ plants in

Easy

A

showing RuBP carboxylase activity
B

using more NADPH for the formation of one hexose during dark reaction
C

using more ATP for the formation of one hexose than C₃ plants.
D

showing photorespiratory loss of carbon in the presence of light

Solution

C₄ plants use 30 ATP for the formation of one hexose where as C₃ plants use only 18 ATP. C₄ plants usually do not show photorespiration whereas C₃ plants show photorespiration.

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