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1.In the bacterial lac repressor, which of these occurs:

A.In the presence of glucose and the absence of lactose, the repressor is actively produced.

B.The lac operon can be hyper-induced in the presence of low glucose by the 'cAMP binding protein' (CAMP).

C.In the presence of lactose and the absence of glucose the lac operon is repressed.

D.Allolactose is a byproduct of β-galactosidase, indicating high lactose when it builds up.

2 In eukaryotes the enhancer elements can be quite a distance upstream or downstream from the promoter, and transcriptional regulation is helped by protein:protein interactions.

True

False

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Tod Thiel
Tod ThielLv2
28 Sep 2019

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