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Investigate simple diffusion and osmosis using plant tissue and non-living materials, including dialysis (Visking) tubing and agar
1 Answer 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)
1 Answer Investigate the progress of enzyme-catalysed reactions by measuring rates of formation of products using catalase and rates of disappearance of substrate using amylase
1 Answer Investigate the difference in activity between an enzyme immobilised in alginate and the same enzyme free in solution, and state the advantages of using immobilised enzymes
1 Answer State that enzymes are globular proteins that catalyse reactions inside cells (intracellular enzymes) or are secreted to catalyse reactions outside cells (extracellular enzymes)
1 Answer Relate the structure of haemoglobin to its function, including the importance of iron in the haem group
1 Answer What is Water high specific heat capacity and latent heat of vaporisation?
1 Answer Describe the molecular structure of phospholipids with reference to their hydrophilic (polar) phosphate heads and hydrophobic (non-polar) fatty acid tails
1 Answer Relate the molecular structure of triglycerides to their functions in living organisms
1 Answer State that triglycerides are non-polar hydrophobic molecules and describe the molecular structure of triglycerides with reference to fatty acids (saturated and unsaturated), glycerol and the formation of ester bonds
1 Answer
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