Science Coordinate 0654: B4. Enzymes Topical Past Paper Questions
Cambridge IGCSE Science Coordinate (0654) past-paper questions on B4. Enzymes, free. This topic is frequently examined across 23 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
A student investigates the effect of enzyme volume on an enzyme-controlled reaction. Plant cells such as celery cells contain the enzyme catalase. Catalase speeds up the breakdown of aqueous hydrogen peroxide into water and oxygen gas. The oxygen gas released forms a foam when mi…
(a) Amylase is an enzyme in the digestive system in humans. (i) State two places in the digestive system where amylase is secreted. 1 ..... [2] 2 ..... [1] (ii) Complete the sentence about amylase. Amylase breaks down starch to simple ..... [1] (b) A student mixes amylase and sta…
A student investigates the effect of catalase on the breakdown of hydrogen peroxide. Catalase is an enzyme found in living cells such as potato cells. Catalase speeds up the breakdown of hydrogen peroxide into oxygen gas and water. $$ hydrogen~peroxide\rightarrow oxygen~+~water $…
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