A) 0.5
B) 0.7
C) 1.0
D) 1.5
Correct Answer: C
Solution :
Respiratory quotient or RQ is dimensionless number used in calculations of Basal Metabolic Rate (BMR). It is calculated by the amount of \[\text{C}{{\text{O}}_{\text{2}}}\]eliminated to the \[{{\text{O}}_{2}}\]consumed. i.e., \[\text{RQ}\,\text{=}\frac{\text{C}{{\text{O}}_{\text{2}}}\,\text{eliminated}}{{{\text{O}}_{\text{2}}}\,\text{consumed}}\] Formula for glucose (carbohydrate) is\[{{\text{C}}_{6}}{{H}_{12}}{{O}_{6}}\]Thus, On comparing number of molecules of \[{{O}_{2}}\]to the molecules of \[C{{O}_{2}}.\]We have the ratio 1 to 1 since, the molecules of \[{{O}_{2}}\]and \[C{{O}_{2}}\]are same, i.e., \[RQ=\frac{6}{6}(i.e.,\,1).\] Hence, RQ for glucose is 1 and for fat is 0.7, more than 1 (i.e., 1.5 or more means anaerobic respiration is taking place).
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