Explaining effects of substrate concentration and temperature on enzyme rate
I can explain how and why the rate of an enzyme reaction is affected by substrate concentration and temperature.
Explaining effects of substrate concentration and temperature on enzyme rate
I can explain how and why the rate of an enzyme reaction is affected by substrate concentration and temperature.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- The rate of a reaction is the amount of change (e.g. substrate broken down or product made) per unit of time.
- Enzyme reaction rate increases as substrate concentration increases until an optimum when all active sites are full.
- Enzyme reaction rate increases with temperature due to more collisions, until an optimum when all active sites are full.
- Enzyme rate decreases as temperature increases above the optimum as bonds break and the active site becomes denatured.
- Interpretation of graphs showing effects of substrate concentration and temperature on enzyme reaction rate.
Keywords
Rate of reaction - A measure of how much change occurs per unit of time.
Concentration - A measure of the quantity of a dissolved substance in a given volume of solution.
Optimum - The conditions where maximum rate of reaction occurs.
Bond - A force of attraction between atoms in a compound.
Denatured - A permanent change in the shape of an enzyme that stops it from working properly.
Common misconception
Enzymes die rather than denature.
The word denature is clearly introduced and a CfU explores the word die vs denature.
Equipment
Content guidance
- Risk assessment required - equipment
Supervision
Adult supervision required
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
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Starter quiz
6 Questions
Exit quiz
6 Questions
graph B
graph A
