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Consider this reaction (the forward reaction only) from lactate fermentation: py

ID: 34670 • Letter: C

Question

Consider this reaction (the forward reaction only) from lactate fermentation:

pyruvate + NADH + H+   ? lactate + NAD+

This is a redox reaction. There is one reduction half reaction and there is one oxidation half reaction. The reduction half reaction is the substrate ? product pair that results in reduction, and the oxidation half reaction is the substrate ? product pair that results in oxidation.

Answer and provide a brief explanation for the four questions below. Please number your answers.

Which of the substrates is in the oxidized form?

Which of the substrates is in the reduced form?

What is the reduction half reaction?

What is the oxidation half reaction?

Explanation / Answer

s redox reaction consists of two half reactions:

pyruvate + 2 H+ + 2 e