FOOD TECHNOLOGY

Detailed explanation-1: -Although oxygen itself is not part of the Krebs cycle, its presence at the end of the mitochondrial electron transport chains ensures recycling of NAD+ and FAD required in the Krebs cycle (Figure 74-7). AcCoA, derived from glucose, fatty acids, or protein catabolism, condenses with oxaloacetate in step 1.

Detailed explanation-2: -Introduction. In the presence of oxygen organisms are capable of using the Kreb’s Cycle. The reason oxygen is required is because the NADH and [FADH2] produced in the Kreb’s Cycle are able to be oxydized in the electron transport chain (ETC) thus replenishing the supply of NAD+ and [FAD].