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Chapter 24: Q38P (page 1125)

Explain why the conversion of pyruvate to lactate is a reversible reaction, but the conversion of pyruvate to acetaldehyde is not reversible.

Short Answer

Expert verified

The conversion of pyruvate to acetaldehyde is a decarboxylation reaction. Therefore, carbon dioxide cannot be gotten back onto acetaldehyde.

Step by step solution

01

Conversion of pyruvate to lactate

The conversion of pyruvate to lactate is done by reduction. So, we can get pyruvate back by oxidation as:

02

Conversion of pyruvate to acetaldehyde

The conversion of pyruvate to acetaldehyde can take place by the removal of carbon dioxide gas as:

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