Question

How many molecules of NADH are produced when four molecules of phosphoglyceraldehde are converted into four molecules of pyruvate?

• A. $2$
• B. $6$
• C. $8$
• D. $4$

Answer 1

The correct option is A $2$

Glycolysis is a series of reactions that extract energy from glucose by splitting it into two three-carbon molecules called pyruvates. Glycolysis takes place in the cytosol of a cell, and it can be broken down into two main phases: the energy-requiring phase and the energy-releasing phase. Each three-carbon sugar is converted into another three-carbon molecule, pyruvate, through a series of reactions. In these reactions, ATP molecules and one NADH molecule are made. Because this phase takes place twice, once for each of the two three-carbon sugars, it makes four ATP and two NADH overall.

So the correct option is '2'.