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JAMB Biology 2010 Paper

Question : 12

Total: 49

Yeast respires anaerobically to convert simple sugar to carbon (IV) oxide and?

Solution:

Concept:

Anaerobic respiration in yeast is fermentation, which produces ethanol and carbon dioxide.

Explanation:

During anaerobic respiration, yeast breaks down glucose without using oxygen.

The general equation is:

\mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 \rightarrow 2\mathrm{C}_2\mathrm{H}_5\mathrm{OH} + 2\mathrm{CO}_2

Therefore, the other product besides carbon (IV) oxide is alcohol (ethanol).

Answer:

A. alcohol

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