Question

What will be the metabolic fate of pyruvic acid in absence of $O_2$?

• A. Partial oxidation will take place
• B. Complete oxidation
• C. Utilisation for reoxidation of NADH
• D. Dependent on energy need

Answer 1

The correct option is C Utilisation for reoxidation of NADH

In the process of glycolysis, a net profit of two ATP there, two NAD${}^{+}$ were reduced to two NADH + H${}^{+}$, and glucose was split into two pyruvate molecules. When oxygen is not present, pyruvate will undergo a process called fermentation. In the process of fermentation the NADH + H${}^{+}$ from glycolysis will be recycled back to NAD${}^{+}$ so that glycolysis can continue.

So, the correct option is 'Utilisation for reoxidation of NADH'.