Biology

Respiratory Quotient Values

Interpret respiratory quotient values.

RQ = 1 (carbohydrate), <1 (fat), >1 (organic acid)

Formula Explanation

RQ indicates the type of substrate being respired.

Variables Explained

RQ = CO₂ produced / O₂ consumed.

Solved Example

RQ of a germinating castor seed is less than 1. Why?
Because fats are being used as substrate.

Exam Tip

RQ of pure carbohydrate is exactly 1.