Question

Respiratory quotient of which diet is less than unity?

• A. Carbohydrate
• B. Fats
• C. Organic acid
• D. Sugar

Answer 1

Answer: (A)

Respiratory quotient $(R.Q)$ is the ratio of $C{O}_2$ released to oxygen consumed, it is variable for different substrates.
$R\cdot Q=\frac{\text{ released }C{O}_2\text{ volume }}{\text{ consumed }{O}_2\text{ volume }}$
$R.Q1.$ for carbohydrate
$<1$ for fats and proteins (aerobic respiration)
$>1$ for organic acids under aerobic condition $0$ for succulents.