The apparatus used to measure the rate of respiration and the respiratory quotient $(RQ)$ is:

The $R.Q.$ (Respiratory quotient) of $C_{39}H_{72}O_6$ is

The diabetic patient shows:

$2 (C_{52} H_{89} O_{12}) + 145 O_2 \rightarrow 102 CO_2 + 89 H_2O + \text{energy}$.
To make the equation true, what should be placed in the reactant side instead of $2 (C_{52} H_{89} O_{12})$?

Different substrates get oxidized during respiration. How does Respiratory Quotient $(RQ)$ indicate which type of substrate,i.e.,carbohydrate,fat or protein is getting oxidized?

The $R.Q.$ of $Opuntia$ (prickly pear) will be .........