AIIMS2008Botany-Plant Physiology
AIIMS 2008 Botany CAM Photosynthesis MCQ Question
Type: MCQ-conceptual-Hard-Class 11
In succulent plants the stomata open in night and close in day. Which among the following would be best hypothesis to explain the mechanism of stomatal action in night only?
A
CO₂ accumulates, reduces pH, stimulate enzymes resulting in accumulation of sugars.
B
increase in CO₂ concentration, conversion of organic acids into starch resulting in the increased conversion into sugars resulting in K⁺ transport.
C
low CO₂ concentration accumulates organic acids resulting in the increased concentration of cell sap.
D
CO₂ used up, increase pH results in accumulation of sugars.
Correct Answer
Option B
Detailed Explanation
In CAM plants stomata open at night.
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