3 a 008 g dm 3 1 b time taken to digest meal time for glucose to be absorbed into blood 1 c a high blood glucose concentration stimulates cells in islets of langerhans of pancreas to secrete insulin causing conversion of glucose to glycogen in the liver resulting in increased uptake of glucose by liver cells. Palindromic symmetrical alternative wording max 3 b i 3 1 ii 4 1 c active site has specific shape different base pairs have different shapes must fit reference to affinity for active site binds to specific base pairs max 3 3 a placed at one end cathode end of gel reference to electrolyte buffer. Faster than 5 um non myelinated axons max 3 b myelin is made of lipid phospholipid acts as an insulator prevents depolarisation prevents action potential forming depolarisation action potential can only form at nodes of ranvier reference to saltatory conduction description impulse jumps from node to node max 3. Through carrier transport protein in membrane that also transports glucose max 3 award marks for annotated diagram similar to figure 417 on page 51 of biology 2 d i active transport of cl na 1 out of ascending limb of tubule 1 tubule is impermeable to water so concentration inside tubule decreases 1. 10 marking scheme end of chapter test 1 a axes right way round y number of microorganisms x time indicated by either label both axes labelled sigmoid shape
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