Which of the following occurs in the CAM pathway during the night?

C O_{2}

is released which is used in the Calvin cycle

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Malic acid is stored in the vacuole

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Malic acid is converted to malate

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Malate is converted to phosphoenolpyruvate

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Solution

The correct option is B Malic acid is stored in the vacuole
During the night, malic acid is stored in the vacuole. $C O_{2}$ can enter into the leaves through the stomata during the night. PEP, on receiving $C O_{2}$ , gets converted to oxaloacetic acid. The oxaloacetic acid is then converted to malic acid. In this way, $C O_{2}$ is stored in the form of malic acid in the vacuoles during the night. During the day, this malic acid is converted to malate. Malate is then converted to pyruvate, and $C O_{2}$ is released. This $C O_{2}$ is then used in the Calvin cycle.

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