Correct option (a) Both A and R are true and R is the correct explanation of A
Explanation:
The ratio of the volume of CO2 evolved to the volume of O2 consumed in respiration is called the respiratory quotient (RQ) or respiratory ratio.
RQ = Volume of CO2 evolved/Volume of O2 consumed
The respiratory quotient depends upon the type of respiratory substrate used during respiration. When carbohydrates are used as substrate and are completely oxidised, the RQ will be 1 , because equal amounts of CO2 and O2 are evolved and consumed.
C6 H12 +6O2 6CO2 + 6H2O + Energy
RQ = 6CO2/6O2 = 1
