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18 July, 20:48

The tryptophan operon is a repressible operon that is turned off whenever tryptophan is added to the growth medium. turned on only when tryptophan is present in the growth medium. turned on only when glucose is present in the growth medium. permanently turned on.

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  1. 18 July, 21:10
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    A) NO - turned off when trp is present (don't need to make more!)

    b) YES - no tryptophan, then need to make some

    c) NO - never permanently turned on
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