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Question

The value of R.Q. of a succulent plant at night is

A
< 1.
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B
> 1.
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C
Zero.
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D
Infinite.
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Solution

The correct option is C Zero.
In succulent plants at night the stomata are open and carbon dioxide is fixed into organic acids. Thus at night there is no net carbon dioxide evolved. Hence, value of RQ is zero.

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