IB Biology HL C1.1.10 Effect of Enzymes on Activation Energy Questions

Explore how an alternative pathway and transition-state stabilisation let enzymes lower activation energy in IB Biology HL C1.1.10.

Exam points

Explain that enzymes lower activation energy by providing an alternative reaction pathway.
Explain how enzyme binding stabilises the transition state, lowering activation energy and increasing reaction rate.

[Maximum number: 1]

(a) The image shows a cell in a section of an onion root tip seen under a light microscope.

The graph shows energy levels throughout an uncatalysed reaction. Draw a curve to show how the action of an enzyme would affect this reaction.

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