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Question

In succulents respiratory quotient is always zero because of

A
Complete oxidation
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B
Complete reduction
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C
Incomplete oxidation
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D
Incomplete reduction
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Solution

The correct option is C Incomplete oxidation
Respiratory quotient is defined as the ratio of carbon dioxide eliminated to that of oxygen consumed. Dark succulents undergo incomplete oxidation. When incomplete oxidation takes place, the value of R.Q. is zero. It is because during incomplete oxidation no carbon dioxide is released. Thus, the correct answer is option C.

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