AP BIOLOGY

Detailed explanation-1: -Two molecules of acetyl-CoA are produced from each glucose molecule so two turns of the Krebs cycle are required which yields four CO2, six NADH, two FADH2 and two ATPs.

Detailed explanation-2: -For example, the breakdown of glucose by glycolysis and the citric acid cycle yields a total of four molecules of ATP, ten molecules of NADH, and two molecules of FADH2 (see Chapter 2).

Detailed explanation-3: -Cellular respiration produces a maximum of 10 NADH and 2 FADH2 per glucose molecule.

Detailed explanation-4: -Three NADH+ and one FADH2 are generated in one cycle which, on entering the electron transport chain, yields 10 ATP. These include one ATP produced by succinate thiokinase at the substrate level. Two carbon atoms are lost in this cycle by decarboxylation, although these are not the same atoms entering as acetyl-CoA.

Detailed explanation-5: -For each glucose that enters glycolysis, products of the citric acid cycle are 2 ATP, 6 NADH, and 2 FADH2.