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Respiratory Quotient

If volume of ...

Question

If volume of ${C O}_{2}$ liberated during respiration is more than the volume of $O_{2}$ used, then the respiratory substrate will be

A

Carbohydrate

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B

Fat

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C

Protein

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D

Organic acid

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Solution

The correct option is D Organic acid
RQ slightly more than unity is found when organic acids are broken down as respiratory substrates under aerobic conditions, e.g. for the breakdown of oxalic acid liberation of $C O_{2}$ is more than $O_{2}$ .
$R Q = \frac{4 {C O}_{2}}{O_{2}} = 4.0$ .
So the correct option is D.

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