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Biology · Oct / Nov 2025 · Paper 41 · Question 6

0610

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Fig. 6.1 is a diagram of a cell that shows how DNA is involved in protein synthesis. DNA mRNA mRNA ribosome growing protein chain free amino acids Fig. 6.1

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  • 6(a)[1]

    nucleus ;

  • 6(b)[1]

    any one from:

    enzymes ;

    membrane carriers ;

    receptors for neurotransmitters ;

    AVP ;

  • 6(c)[3]

    any three from:

    (mRNA) is a copy of the gene / DNA / base sequence ;

    gene / DNA, remains in the nucleus ;

    (mRNA takes instructions) to cytoplasm / ribosome ;

    mRNA, passes through / attaches to / ‘read by’, ribosome ;

    base sequence determines sequence of amino acids (in the protein) ;

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