In CAM cycle, during the formation of malic acid, stomata remains
A
Open
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B
Closed
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C
Semi open
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D
Always closed
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Solution
The correct option is D Open CAM method is a carbon fixation pathway that evolved in some plants as an adaptation to arid conditions. In a plant using full CAM, the stomata in the leaves remain shut during the day to reduce evapotranspiration, but open at night to collect carbon dioxide. The carbon dioxide is then stored as a four-carbon acid, malate, and then used for photosynthesis during the day. The pre-collected CO2 is concentrated around the enzyme RuBisCO, increasing photosynthetic efficiency.