Scheme of Work Cambridge International as & a level

Extension activity: Learners research the different types of immobilisation. These include cross-linkage, encapsulation and adsorption. What are their relative advantages and disadvantages?

Past and specimen papers

Past/specimen papers and mark schemes are available to download at www.cambridgeinternational.org/support (F)

4: Cell membranes and transport

Syllabus ref. and Key Concepts (KC)	Learning outcomes	Suggested teaching activities
4.1 Fluid mosaic membranes KC1 KC2 KC5 KC6	4.1.1 Describe the fluid mosaic model of membrane structure with reference to the hydrophobic and hydrophilic interactions that account for the formation of the phospholipid bilayer and the arrangement of proteins. 4.1.2 Describe the arrangement of cholesterol, glycolipids and glycoproteins in cell surface membranes. 4.1.3 Describe the roles of phospholipids, cholesterol, glycolipids, proteins and glycoproteins in cell surface membranes, with reference to stability, fluidity, permeability, transport (carrier proteins and channel proteins), cell signalling (cell surface receptors) and cell recognition (cell surface antigens – see 11.1.2). 4.1.4 Outline the main stages in the process of cell signalling leading to specific responses.