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Biology · Oct / Nov 2024 · Paper 41 · Question 6

0610

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Penicillin can be produced in fermenters.

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  • 6(a)[1]

    fungus / fungi ;

  • 6(b)[3]

    X: lag (phase)

    Y: log (phase) / exponential (phase)

    Z: stationary (phase)

  • 6(c)(i)[2]

    organisms need oxygen ;

    for (aerobic) respiration ;

  • 6(c)(ii)[3]

    any three from:

    respiration, produces heat ;

    ref. to enzymes (in organisms) ;

    (enzymes are) denatured by excess heat ;

    to keep (the fermenter) at the optimum (temperature) ;

    for maximum yield of product ; ora

    AVP ;

  • 6(c)(iii)[2]

    any two from:

    ref. to mixing / stirring ;

    ensure even / uniform, distribution of, oxygen / air / nutrients / fungi ; ensure even / uniform, temperature / pH, (in all parts of the fermenter) ;

  • 6(c)(iv)[2]

    any two from:

    insulin ;

    mycoprotein ;

    AVP ;

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