GCSE Enzymes introduction including lock and key theory

This PowerPoint covers why enzymes are important, what they are, and lock and key theory.

However, it is designed to introduce the concept of them being biological catalysts and the lock and key theory.

This resource is designed for lower ability KS4 and KS3 students.

The lesson objectives are set as:
All: You can state what enzymes are
Most: You can describe what the active site is
Some: You can explain the lock and key theory

There is a cloze sheet included so students can add the key words (here in black font) from the PowerPoint as they work through it.

The cloze sheet is also separated into all, most and some, so students can see that they are progressing.

There are some simple animations included in the PowerPoint to emphasize how the substrate must fit the active site.

AfL: There is a 4 picture cartoon so students can sequence the events in the lock and key theory, using them to explain what happens at each stage. This AfL task does focus on the 'some' part of the lesson so may present a challenge to some students. However, I differentiate by giving some students fewer pictures, just so they can focus on stating what an enzyme is and what the active site is

This lesson does not include examples of enzymes, but at the beginning of the lesson I do use the first slide to emphasise how enzymes allow the life process to happen and without them we could not survive.

Any questions, comment or feedback, please let me know.

Many thanks