Paper 4 · June 2004 · Enzymes

Name the enzyme present in yeast that is responsible for breaking down hydrogen peroxide into water and oxygen.

Model answer

catalase

Explanation

Catalase is the enzyme in yeast (and most living cells) that catalyses the decomposition of hydrogen peroxide, a toxic by-product of metabolism, into water and oxygen.

Derived from ZIMSEC Biology Paper 4 (Practical Test), Jun 2004, Q3

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More questions from this paper

When catalase breaks down hydrogen peroxide in yeast, which gas is produced?
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