A - Unity and Diversity
B - Form and Function
B1.1 Carbohydrates and lipids
B1.2 Proteins
B2.1 Membranes and membrane transport
B2.2 Organelles and compartmentalization
B2.3 Cell specialization
B3.1 Gas exchange
B3.2 Transport
B3.3 Muscle and motility (HL)
B4.1 Adaptation to environment
B4.2 Ecological niches
C - Interaction and Interdependence
D - Continuity and Change
View a summary cheatsheet for B2.1 Membranes and membrane transport
B2.1.1 Lipid bilayers as the basis of cell membranes
B2.1.2 Lipid bilayers as barriers
B2.1.3 Simple diffusion across membranes
B2.1.4 Integral and peripheral proteins in membranes
B2.1.5 Movement of water molecules across membranes by osmosis and the role of aquaporins
B2.1.6 Channel proteins for facilitated diffusion
B2.1.7 Pump proteins for active transport
B2.1.8 Selectivity in membrane permeability
B2.1.9 Structure and function of glycoproteins and glycolipids
B2.1.10 Fluid mosaic model of membrane structure
B2.1.11 Relationships between fatty acid composition of lipid bilayers and their fluidity (HL)
B2.1.12 Cholesterol and membrane fluidity in animal cells (HL)
B2.1.13 Membrane fluidity and the fusion and formation of vesicles (HL)
B2.1.14 Gated ion channels in neurons (HL)
B2.1.15 Sodium–potassium pumps as an example of exchange transporters (HL)
B2.1.16 Sodium-dependent glucose cotransporters as an example of indirect active transport (HL)
B2.1.17 Adhesion of cells to form tissues (HL)
