Question

Which process produces both NADH and $FAD{H}_2$?

• A. Krebs cycle
• B. Glycolysis
• C. Electron transport system
• D. Fermentation

Answer 1

The correct option is A Krebs cycle

In respiration energy is produced by three processes :

1. Glycolysis
2. Krebs cycle
3. Electron transport system

In glycolysis, glucose molecule is broken into two molecules of pyruvate where NADH and ATP are produced. In Krebs cycle acetate is derived from pyruvate by the process of oxidation and degradation, here ATP, NADH, and FADH${}_2$ are produced.

So, the correct option is ' Krebs cycle'.