Question

RQ in anaerobic respiration is?

• A. $0.7$
• B. $0.9$
• C. Unity
• D. Infinity

Answer 1

The correct option is D Infinity

During aerobic respiration, oxygen is consumed and carbon dioxide is released. The ratio of the volume of carbon dioxide given out to the volume of oxygen absorbed in respiration, i.e., CO${}_2$/O${}_2$ is called respiratory quotient (RQ) or respiratory ratio. in anaerobic respiration, CO2 is evolved but O2 is not consumed, and therefore RQ is infinite (∞).

Equation is as follows:

C${}_6$H${}_{1}2$O${}_6$ $\to$ 2C${}_2$H${}_5$OH + 2CO${}_2$ + energy

RQ CO${}_2$/O${}_2$ = 2/0 = infinity

So the correct option is 'infinity'.