Question

The amount of energy released in complete oxidation of one molecule of glucose is

• A. 628 kcal
• B. 668 kcal
• C. 673 kcal
• D. 697 kcal

Answer 1

The correct option is C 673 kcal

Aerobic respiration may be represented by the general equation:

$C_6{H}_{12}{O}_6$ + 6$O_2$ ---------> 6$C{O}_2$ + 6$H_{2}O$ + 686 kcal
During aerobic respiration complete oxidation of one molecule of glucose yields 686 kcal of energy of which around 13 kcal is lost due to increase of entropy when the complex glucose is broken down.