Fermentation allows a cell to:

• A. Recycle NADH to NAD⁺ for glycolysis.
• B. Use NADH as a terminal electron acceptor.
• C. Reduce NAD⁺ to NADH for glycolysis.
• D. Synthesize ATP via ATP synthase.

Answer: (A)

Verified step by step guidance

1. Understand that fermentation is an anaerobic process that allows cells to continue producing ATP when oxygen is scarce.
2. Recognize that during glycolysis, glucose is broken down into pyruvate, producing ATP and reducing NAD+ to NADH.
3. Identify that the main purpose of fermentation is to regenerate NAD+ from NADH, allowing glycolysis to continue in the absence of oxygen.
4. Note that in fermentation, NADH donates electrons to pyruvate or a derivative, converting it back to NAD+.
5. Conclude that the recycling of NADH to NAD+ is crucial for maintaining the flow of glycolysis, ensuring a continuous supply of ATP in anaerobic conditions.