IMMUNOLOGY

Detailed explanation-1: -The oxidation of one molecule of NADH thus leads to the synthesis of three molecules of ATP, whereas the oxidation of FADH2, which enters the electron transport chain at complex II, yields only two ATP molecules.

Detailed explanation-2: -Oxidative phosphorylation starts with the arrival of 3 NADH and 1 FADH 2start text, end text, start subscript, 2, end subscript from the citric acid cycle, which shuttle high energy molecules to the electron transport chain.

Detailed explanation-3: -Basically, the NADH and FADH2 molecules are affixed with electrons and are transferred to the inner membrane of the mitochondria. They travel down the electron transport chain, releasing the electrons that they once had. The end result is loads of energy, approximately 34 ATP (energy molecule).