amino acids/ proteins/ dna 0.0 / 5 ? ChemistryBiochemistryA2/A-levelAQA Created by: hollysunshineyCreated on: 02-05-17 17:52 What can amino acids react with? acids and bases - so are amphoteric 1 of 9 Do amino acids show stereoisomerism chiral molecules - central C has 4 different groups attached 2 of 9 what is a zwitterion a dipolar ion which has a + and - charge 3 of 9 when do zwitterions exist near an amino acids isoelectric point 4 of 9 where does hydrogen bonding exist? between polar groups -e.g OH & NH2 5 of 9 what does the amino acid cysteine contain? thiol group (SH)- so can lose the H and form disulfide bonds 6 of 9 enzymes are made up of amino acids... which contain chiral centers - so active site only works for 1 enantiomer of substrate 7 of 9 where does the deoxyribose join onto the base onto an N in the base which is NOT as a side chain 8 of 9 what does cisplatin do? forms coordinate with N on guanine (and gets rid of Cl ligand) x2 9 of 9
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