Question

On which of the following does the respiratory quotient depend?

(a) The respiratory concentration of Oxygen

(b) The respiratory substrate used during respiration

(c) The volume of Carbon-dioxide evolved

(d) Energy evolved during respiration

This question was posed to me in an online quiz.

The origin of the question is Respiratory Quotient topic in chapter Respiration in Plants of Biology – Class 11

Answer 1

Right answer is (b) The respiratory substrate used during respiration

For explanation I would say: The respiratory quotient depends upon the type of respiratory substrate used during respiration. In living organisms, respiratory substrates are often more than one.