After the Krebs cycle only a small portion of the energy of gluecose has been converted to atp. At this point the majority of usable energy contained in

At this point the majority of usable energy contained in  reduced electron carriers NADH and FADH2.

Oxidative phosphorylation often create the highest amount of the energy generated in the cell.

The combination of glycolysis and the citric acid cycle  alone in the kreb cycle will yield only 4 ATP. The highest reminder or majority of the energy is stored in the electron carriers NADH and FADH2.

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NADH and FADH2

Explanation:

Energy is released in glycolysis and krebs cycle in the form of NADH and FADH2 ,electron transport chain transforms this energy into ATP

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex