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.
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.
Common misconception
Enzymes die rather than denature.
The word denature is clearly introduced and a CfU explores the word die vs denature.
Keywords
Rate of reaction - A measure of how much change occurs per unit of time.
Concentration - A measure of the quantity of dissolved substance.
Optimum - The conditions where maximum rate of reaction occurs.
Bond - The attraction between atoms in a molecule.
Denatured - A permanent change in the shape of an enzyme which stops it from working.
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).
Video
Loading...
Starter quiz
6 Questions
![An image in a quiz](/_next/image?url=https%3A%2F%2Foaknationalacademy-res.cloudinary.com%2Fimage%2Fupload%2Fv1709046814%2Fnovp3xmjt6ozvh1rowlx.png&w=640&q=75)
![An image in a quiz](/_next/image?url=https%3A%2F%2Foaknationalacademy-res.cloudinary.com%2Fimage%2Fupload%2Fv1709046813%2Fpb5i4z47dtuq0d7qj5qe.png&w=640&q=75)
Exit quiz
6 Questions
![An image in a quiz](/_next/image?url=https%3A%2F%2Foaknationalacademy-res.cloudinary.com%2Fimage%2Fupload%2Fv1709221391%2Fworl4rjicxqnptwdrwxi.png&w=1080&q=75)
graph B
graph A
![An image in a quiz](/_next/image?url=https%3A%2F%2Foaknationalacademy-res.cloudinary.com%2Fimage%2Fupload%2Fv1709214912%2Fvijsofdk6wljpomygahj.png&w=640&q=75)
![An image in a quiz](/_next/image?url=https%3A%2F%2Foaknationalacademy-res.cloudinary.com%2Fimage%2Fupload%2Fv1709214911%2Fqgyzaavwxs6wxaxbemqg.png&w=640&q=75)