The diagram below shows the energy conversions of the Krebs cycle, which is part of cellular respiration. The U-shaped arrows that show changes for NAD+, FAD, and ADP molecules represent energy conversions. From each glucose
molecule, two acetyl-CoA molecules are made for the Krebs cycle.
NADH
NAD+
Acetyl-CoA
FADH2
CC
CoA
FAD
COA
4-carbon
Citric Acid
compound

ADP
CO2
ATP
5-carbon
NADH
compound
NAD+
NAD
ССССС
CO2
NADH