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natita [175]
4 years ago
6

How does CRA-cAMP positively regulate the lac operon?

Biology
1 answer:
slavikrds [6]4 years ago
5 0

Answer:

The CRA-cAMP complex increases the rate of expression of lac operon when glucose is absent and lactose is present as nutrient.

Explanation:

CRP is the catabolite gene activator protein that forms a complex with cAMP. The CRP-cAMP complex facilitates the binding of RNA polymerase to the promoter region of the lac operon. This robust binding as stimulated by CRP-cAMP complex is followed by the formation of open complex and initiation of gene expression.  

Hence, the CRP-cAMP complex positively regulates the lac operon and increases its expression when glucose is not present.

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In the experimental labster simulation, kidney cells were treated with a chemical for different amounts of time. The number of d
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Answer:

B. similar to the cells just treated with the dye - 0% dead

Explanation:

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4 0
3 years ago
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Answer:

"Phospholipids in the lipid bilayer can either move rotationally, laterally in one bilayer, or undergo transverse movement between bilayers. Lateral movement is what provides the membrane with a fluid structure."

Source: Google

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Answer:

What is a good example of a response-based definition of stress?

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Explanation:

Stress can have many different causes. In this case, it is produced by seeing danger in Jack by having a knife. His heart rate increases because this is a common response in stress, which would enable people to scape. It is important to control stress lebels.

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