NEET Biology Respiration In Plants Based Practice Questions & Answers with Viewers Discussion and Detailed Explanation

Answer: (c)

The ratio of the volume of $CO_2$ released to volume of $O_2$ absorbed in the respiratory process is termed as the respiratory ratio or Respiratory Quotient.

R.Q. = ${\text"Volume of" CO_2 \text"evolved"}/{\text"Volume of" O_2  \text"absorbed"}$

Value of R.Q. varies from one respiratory substrate to another, e.g., R.Q. of carbohydrates is equal to 1, R.Q. of lipids and proteins are less than 1, that of organic acid is greater than 1.