GCSE Biology Enzymes Notes

I’ve made a resource that you can use to help make sure you’ve actually understood the basics of the Enzymes topic! I’ve broken it into smaller chunks so it’s not so overwhleming and hopefully easier to understand! Ive tried to make it aesthetic, simple & easier to understand. I hope it helps!

Note this may not be everything you need to know for your exam- I try to cover the fundementals of the topic. You will need to check your specification/ syllabus to see if you do/ do not need to learn the information in my resources.

It covers the following:
Describe a catalyst as a substance that increases the rate of a chemical reaction and is not changed by the reaction
Describe enzymes as proteins that are involved in all metabolic reactions, where they function as biological catalysts
Describe why enzymes are important in all living organisms in terms of a reaction rate necessary to sustain life
Describe enzyme action with reference to the shape of the active site of an enzyme being complementary to its substrate and the formation of products
Explain enzyme action with reference to: active site, enzyme-substrate complex, substrate and product
Explain the specificity of enzymes in terms of the complementary shape and fit of the active site with the substrate
Explain the effect of changes in temperature on enzyme activity in terms of kinetic energy, shape and fit, frequency of effective collisions and denaturation
Explain the effect of changes in pH on enzyme activity in terms of shape and fit and denaturation

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