An engaging and detailed lesson presentation (53 slides) and associated worksheets that looks at the properties and functions of enzymes and explores how the rate of enzyme-controlled reactions changes with changes in conditions. The lesson begins by using a quick quiz competition to introduce the key terms of active site and substrate. Diagrams accompany the important descriptions so that students can visualise how enzymes are specific to a single substrate and will form enzyme-substrate complexes with only them. Emil Fischer’s lock and key hypothesis is briefly discussed so that the correlation between the hypothesis and key terms can be made. Students are shown how most enzymes or groups of enzymes can be named by remembering two rules and they will be tested on this through a second competition. At this point, a progress check is used to allow the students to assess their understanding and ability to bring the information together for enzyme function.
The rest of the lesson looks at how changing the temperature and pH will affect the rate of an enzyme controlled reaction. Students will meet the graph shapes that accompany both of these factors and then are helped with the explanation of the trend which is normally poorly done in exam questions.
This lesson has been designed for GCSE students.
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