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tensa zangetsu [6.8K]
3 years ago
5

When the cell is not in the presence of tryptophan,

Biology
1 answer:
padilas [110]3 years ago
3 0

Explanation:

When the cell is NOT in the presence of tryptophan,. RNA polymerase can transcribe mRNA ... To ensure that the cell has a supply of tryptophan at all times.

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