IB Biology: B2.1 Membranes and membrane transport (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 B2.1 Membranes and membrane transport in the new IB Biology specification.

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This Powerpoint consists of 62 slides and contains the followings:

All the information ( HL) the IB have included in the new spec.
Exam tips
Clear diagrams
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Student research tasks
Clearly identified HL and SL content
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Summary

The following content is included:

B2.1: Describe the formation of sheet-like bilayers in water by amphipathic lipids.
B2.2: Explain the reasons behind the selective permeability of the lipid bilayer.
B2.3: Discuss the movement of molecules by diffusion across the lipid bilayer.
B2.4: Identify integral and peripheral proteins.
B2.5: Discuss the role of aquaporins in transporting water.
B2.6: Describe the structure and role of channel proteins.
B2.7: Explain the importance of pump proteins in active transport.
B2.8: Explain the role of facilitated diffusion and active transport in the selective permeability of membranes.
B2.9Describe glycoproteins and glycolipids with respect to their structure and function.
B2.10: Draw the fluid mosaic model of membrane structure.
B2.11:Describe the role of lipids in membrane fluidity.
B2:12: Discuss the role of cholesterol in membrane fluidity.
B2.13: Differentiate between exocytosis and endocytosis.
B2.14: Describe the role of gated channels.
B2.15: Explain the mechanisms of direct active and indirect active transport.
B2.16: State the role of cell-adhesion molecules.
B2.17:  Identify the different types of cell junctions.