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. 5 marking scheme end of chapter test 1 a i organisms that use autotrophic nutrition can make their own organic molecules using inorganic substances 1. 3 mrna attaches to the ribosome reference to start codon trna molecules have a specific amino acid attached anticodon of a trna binds to the first codon on mrna by complementary base pairing second trna binds to the second codon on the mrna brings two amino acids close together peptide bond is formed between the two amino acids. Max 3 b use of fertiliser to increase growth supply nutrients supply minerals supply named mineral where mineral may be limiting growth for plants grown for. Faster than 5 m 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
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