R.Q. is less than 1 if the respiratory substrate is _______.

Organic acid

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Fats and proteins

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Sucrose

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Glucose

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Solution

The correct option is B Fats and proteins
Respiratory quotient or R.Q is the ratio of the volume of carbon dioxide evolved to that of oxygen consumed by an organism, tissue, or cell in a given time. R.Q is less than one for fats & proteins.
R.Q is 1 for carbohydrates like sucrose and glucose and it is more than 1 for organic acids.

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