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DerKrebs [107]
3 years ago
12

The expression of the lac operon in an

Biology
1 answer:
nevsk [136]3 years ago
8 0
<span>C. will decrease when glucose is present.</span>
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Which molecule is a first messenger but not a second messenger
k0ka [10]

Answer:

Hormones act as first messenger but not as second messengers.

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         Hormones are extracellular signaling molecules whereas second messengers are intracellular signaling molecules.

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