Photosynthesis Question 61
61. $C_4$ plants are more efficient in photosynthesis than $C_3$ plants due to:
[2010]
(a) Higher leaf area
(b) Presence of larger number of chloroplasts in the leaf cells
(c) Presence of thin cuticle
(d) Lower rate of photorespiration
Show Answer
Answer : d
Hints & Solution
(d) $C_4$ plants are more efficient in photosynthesis than $C_3$ plants due to photorespiration. Photorespiration is an inhibitory process that decreases the rate of photosynthesis. It is absent in $C_4$ plants and present only in $C_3$ plants.
