Cambridge IGCSE Biology (0610) - IGCSE Biology - Enzymes (5.1)

🎓 IGCSE Biology - The Complete Course: https://www.tes.com/teaching-resource/resource-12989155 IGCSE Chemistry - The Complete Course: 🎓 Complete Teaching Resource (including past exam questions and mark schemes organised by chapter): https://www.tes.com/teaching-resource/resource-13280954 🎓 Student resource (PDF only): https://www.tes.com/teaching-resource/resource-13245244 🎓 All the videos (the complete library on Patreon): https://www.patreon.com/igbiocomplete ☕️ Buy me a coffee - https://www.buymeacoffee.com/ArthurJohnParker Cambridge IGCSE Biology (0610/0970) Chapter 5 - Enzymes Topic 5.1 - Enzymes For exams from 2025 (core and extended) As always this video follows the Cambridge syllabus exactly and contains absolutely everything you need to know for your final exam! My other channels: @igpecomplete - Cambridge IGCSE PE @ocrpecomplete - OCR GCSE PE Timestamps: 0:00 Contents 0:30 Enzymes 1:04 Enzyme action 1:46 Temperature 2:34 PH 3:07 Enzyme action (extended) 3:44 Temperature and PH (extended) Core content: - 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. - Investigate and describe the effect of changes in temperature and pH on enzyme activity with reference to optimum temperature and denaturation. Extended content: - 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.