Answer :
Most of the energy in the cell is liberated by oxidation of carbohydrate, when pyruvic acid is converted to
C
O
2
and
H
2
O
. Pyruvate when enters Krebs cycle it generates a lot of energy in the form of NADH,
F
A
D
H
2
and GTP, also produces carbon dioxide and water as the by-product through several steps.