O-LevelBiologyEnzymes5090/12 · May/June 2023 · Q61 Mark
The graph shows the concentration of maltose produced when amylase digests starch at different pH values. [Figure 6.1] What explains the shape of the graph between point X and point Y?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
AThe enzyme is completely denatured and does not work at all.
BThe enzyme molecules have less kinetic energy.
CThe shape of the enzyme active site is changing and does not fit the substrate so well.
DThe substrate molecules have more kinetic energy.
✓ Correct answer
C: The shape of the enzyme active site is changing and does not fit the substrate so well.
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Enzymes and see which topics are most likely to come up next.
Sign up free →