AP BIOLOGY

Detailed explanation-1: -In the Krebs cycle, two ATP, six NADH +H+, and two FADH2 were produced. A net of four ATPs was produced from glycolysis through the Krebs cycle. More ATP will be produced from reduced coenzymes in the mitochondria during the electron transport chain and oxidative phosphorylation.

Detailed explanation-2: -The tricarboxylic acid (TCA) cycle, also known as the Krebs or citric acid cycle, is the main source of energy for cells and an important part of aerobic respiration. The cycle harnesses the available chemical energy of acetyl coenzyme A (acetyl CoA) into the reducing power of nicotinamide adenine dinucleotide (NADH).

Detailed explanation-3: -NADH: High energy electron carrier used to transport electrons generated in Glycolysis and Krebs Cycle to the Electron Transport Chain. FADH2: High energy electron carrier used to transport electrons generated in Glycolysis and Krebs Cycle to the Electron Transport Chain.

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.