A-LevelBiologyEnzymes9700/12 · Oct/Nov 2025 · Q91 Mark
Enzyme P has been found in a tropical grass. • The enzyme catalyses the hydrolysis of the fungal polysaccharide, chitin, into amino sugars. • It also inhibits the activity of an enzyme in locust guts which catalyses the digestion of amylose. Which row describes the actions of enzyme P?
Areaction catalysed: hydrolysis of glycosidic bonds, reaction inhibited: condensation of glycosidic bonds
Breaction catalysed: hydrolysis of glycosidic bonds, reaction inhibited: hydrolysis of glycosidic bonds
Creaction catalysed: hydrolysis of peptide bonds, reaction inhibited: condensation of glycosidic bonds
Dreaction catalysed: hydrolysis of peptide bonds, reaction inhibited: hydrolysis of glycosidic bonds
✓ Correct answer
B: reaction catalysed: hydrolysis of glycosidic bonds, reaction inhibited: hydrolysis of glycosidic bonds
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