Inglise keel unit 5 answers
AVP ; 3 max
[9]
130. (a) plasmid DNA protein
nucleotides / sugar + phosphate + base ; amino acids ;
4 different subunits ; 20 different subunits ;
phosphodiester bonds ; A phosphoester peptide bonds / polypeptide ;
contains P ; contains S / disulphide bonds ;
double-stranded / double helix ; may have 4º structure ;
circular ; ref to, 2º / 3º, structure / AW ;
AVP ; e.g. role of H bonds 3 max
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