Question

In a CAM plant, the concentration of organic acid

• A. Increases during the day
• B. Decrease and increase during the day
• C. Increase during the night
• D. Decrease during any time

Answer 1

The correct option is C Increase during the night

CAM plant is a plant that utilizes Crassulacean Acid Metabolism as an adaptation for arid conditions. $C{O}_2$ entering the stomata during the night is converted into organic acids, which release $C{O}_2$ for the Calvin cycle during the day, when stomata are closed.

So, the correct answer is 'Increase during the night'