BIOH111 - CELLULAR LEVEL OF ORGANISATION: PLASMA MEMBRANE EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS GRADED A++ LATEST UPDATE

BIOH111 - CELLULAR LEVEL OF ORGANISATION: PLASMA MEMBRANE EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS GRADED A++ LATEST UPDATE Integral/Transmembrane Proteins (Structure) Firmly embedded in cell membrane extend through the lipid bilayer Hydrophobic and hydrophilic parts Integral/Transmembrane Proteins (Function) Three isolated functions 1. Ion Channel 2. Transporter 3. Receptor Three shared functions: 1. Cell Identity Maker 2. Linker 3. Enzyme Peripheral Proteins (Structure) Closer to the surface Attached to polar head of membrane lipids Attached to the integral proteins at inner our outer surface Peripheral Proteins (Function) Three shared functions: 1. Cell Identity Maker 2. Linker 3. Enzyme Ion Channel Allows specific ions to pass through water-filled pore Transporter Binds specific substances Changes their shape Moves across membrane Receptor Recognises specific extracellular ligand for lock and key Cell Identity Maker Allows for recognition of 'self' Linker Anchor intra and extracellular filaments to the cell