Question

One molecule of NADH${}_2$ on oxidation yields ............... ATP molecules.

• A. One
• B. Two
• C. Three
• D. Four

Answer 1

The correct option is C Three

The NADH${}_2$ and the FADH${}_2$ are produced during the cycles of respiration. These molecules are produced during the glycolysis and the Krebs cycle. These molecules are oxidized in the process of electron transport system. This is the system in which the electrons is donated from one donor to acceptor. These products are oxidized and the protons are used for creating a gradient which is used in the synthesis of ATP. NADH${}_2$ transfers the electrons to the complex I and then transfers the electrons to the complex II. This results in more number of protons which are pumped by ATP synthase. So, the more protons will result in the production of 3 ATPs.

Thus, the correct answer is option C.