Respiratory quotient (R.Q.) is defined as the ratio of volume of CO2 evolved to the volume of O2 taken in during the respiration process. Value of R.Q. depends on the nature of respiratory substrate and to the extent to which this substance is broken down into simpler products. Which of the following situation will give us the R.Q. value as infinity when alcohol is produced?

Question

Respiratory quotient (R.Q.) is defined as the ratio of volume of CO2 evolved to the volume of O2 taken in during the respiration process. Value of R.Q. depends on the nature of respiratory substrate and to the extent to which this substance is broken down into simpler products. Which of the following situation will give us the R.Q. value as infinity when alcohol is produced? (A) Fats used as substrate under aerobic conditions (B) Organic acid is used as a substrate under aerobic conditions (C) Carbohydrate substrate used under anaerobic conditions (D) Any type of substrate used under aerobic conditions

Tardigrade Admin · Accepted Answer

Respiratory quotient, i.e. R.Q., is a respiratory ratio of the volume of CO2 liberated to the volume of O2 absorbed during respiration. During anaerobic respiration, (when alcohol is produced) the value of R.Q. is infinity because it takes place without oxygen, but CO2 is released (where carbohydrate substrate used under anaerobic conditions). It is seen in alcohol fermentation by yeast.