Question

One molecule of $NADH_2$ is equivalent to how many $ATP$ molecules?

• A. $1$
• B. $3$
• C. $5$
• D. $7$

Answer 1

The Correct Option is B

Oxidation of one molecule of $NADH_2$ produces $3 \,ATP$ molecules while a similar oxidation of $FADH_2$ forms $2 \,ATP$ molecules.

Answer 2

Explanation: The oxidation of one molecule of NADH2 produces 3 ATP molecules while a similar oxidation of FADH2 forms 2 ATP molecules. 

• Cellular respiration produces both FADH2 and NADH2. Both the Krebs cycle and glycolysis produce these chemicals.
• The electron transport system mechanism oxidizes these compounds.
• In this system, electrons are donated from a donor to an acceptor and protons from these oxidized products are utilized to create a gradient that aids in the synthesis of ATP.
• First, electrons are transferred to complex I by NADH2, and subsequently to complex II. As a result, ATP synthase pumps a greater quantity of protons.
• Therefore, three ATPs will be produced for every proton.