IB Biology C1.1: Enzymes (first exams in 2025)

This lesson can be purchased as part of the IB Complete course bundle (first exams 2025) at a heavily discounted price, formed of 40 fully resourced lessons, end of topic exams and student checklists. It can be found here

This PowerPoint contains everything you need to teach the Theme/Unit C1.1 Enzymes in the new IB Biology specification.

**YouTube video is a preview of the full resource (does not include all slides)
**

This Powerpoint consists of over 60 slides and contains the followings:

All the information the IB have included in the new spec.

Exam tips
Clear diagrams
Student research tasks
Clearly identified HL and SL content
Student checklist
Summary

The following content is included:

C1.1: Define metabolism.
C1.2: Distinguish between anabolism and catabolism and give examples.
C1.3: Describe the structure and role of enzymes.
C1.4: Describe the mechanism of enzyme catalysis.
C1.5: Describe the role of molecular motion and substrate–active site collisions in enzyme catalysis.
C1.6: Explain the relationship between the structure of the active site, enzyme–substrate specificity and denaturation.
C1.7: Explain the effect of enzymes on the activation energy.
C1.8: Explain the effect of temperature, pH, substrate concentration on the enzyme activity.
C1.9: Determine reaction rate through experimentation and secondary data.
C1.10:Distinguish intracellular and extracellular enzyme-catalysed reactions.
C1.11: Distinguish cyclical and linear pathways in metabolism.
C1.12: Explain the generation of heat by metabolic reactions.
C1.13: Distinguish competitive and non-competitive inhibition and give examples.
C1.14: Explain the end-product inhibition and give examples.
C1.15: Explain mechanism-based inhibition.