Question

R.Q of respiratory substrate $C_{39}{H}_{72}{O}_6$ would be

• A. 0.718
• B. 1.34
• C. 2.71
• D. 3.25

Answer 1

The correct option is A 0.718

During the food metabolism, the ratio of CO${}_2$ produced and O${}_2$ consumed is called as a respiratory quotient.

R.Q. = volume of CO${}_2$ evolved/volume of O${}_2$ consumed.

C${}_3$${}_9$H${}_7$${}_2$O${}_6$ + 54O${}_2$ gives 39CO${}_2$ + 36H${}_2$O

So the R.Q. = 39CO${}_2$/54O${}_2$ = 0.72

So the correct option is '0.718'.