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Solution


Q.

Net gain of ATP molecules per hexose during aerobic respiration is 
 a) 12         b)    18     c) 36         d)    30
1 A
2 B
3 C
4 D

Ans.

(c) Net gain of ATP during aerobic respiration
1.Glycolysis provides 2ATP molecules and 2NADH+H^+
2.Pyruvate oxidation yields 2NADH + H^+ 
3.Krebs’ cycle produces 2GTP molecules, 6NADH + H^+ and 2FADH_2 molecules.
4.In electron transport system one NADH + H^+ produce 3ATP and FADH2 produces 32 or 34 ATP.
2ATP from glycolysis + 2GTP from TCA cycle and 32/34 ATP 
from ETS/ETC =38/36 ATP molecule.