WJEC GCSE The Sciences (Double Award) Practice Questions - Made-for-Wales GCSE The Sciences (Double Award) - WJEC Qualifications Wales (teaching From 2026) Exam

Enzymes are biological catalysts. What does a catalyst do?

Is used up completely in the reaction Speeds up a reaction without being used up Changes the products of a reaction into different elements Stops all reactions in living cells

Correct Answer:

Speeds up a reaction without being used up

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