Biology · May / June 2023 · Paper 42 · Question 2
0610
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Fig. 2.1 is a diagram of part of a DNA molecule. Fig. 2.1
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2(a)[1]
circle one pair of the inward pointing horizontal sections opposite each other ;
2(b)[1]
21(%) ;
2(c)(i)[1]
gene ;
2(c)(ii)[5]
any five from:
ribosomes make, proteins / polypeptides ;
mRNA is copied from, gene / DNA ;
DNA stays in the nucleus / mRNA is made in nucleus / mRNA leaves nucleus / mRNA moves to cytoplasm ;
mRNA passes through ribosome / AW ;
ribosome, assembles amino acids / translates mRNA (into a protein) / AW ;
(protein synthesis) uses energy ;
order of amino acids determined by base sequence of,
mRNA / DNA / gene ;
2(c)(iii)[2]
any two from:
carriers ;
receptor(s) (proteins) ;
maltase / enzyme ;
AVP ;
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