Question

R.Q. is less than one if the respiratory substrate is

• A. Organic acids
• B. Fats and proteins
• C. Sucrose
• D. Glucose

Answer 1

The correct option is B Fats and proteins

R.Q. or Respiratory Quotient is the ratio of the volume of CO2 produced to the volume of O2 absorbed during cellular respiration. R.Q. of organic acids is more than 1 as they require less oxygen to get oxidised. R.Q. of glucose or sucrose is 1 but that of fats and proteins is less than 1.

So the answer is 'Fats and proteins'.