The correct answer is d: transcription can be turned off when a repressor binds to the DNA near the promoter.
<span>The repressor is a protein which prevents a gene from being expressed (inhibits transcription from occurring). Near the promoter, there is a site called the operator, which is the binding site for the repressor. When the repressor binds, RNA polymerase is prevented from <span>binding to the promoter and initiating transcription. Gene expression is then turned off.</span></span>
I believe it’s formation of snow
Answer:
Yes.
Explanation:
A virus is a dangerous cell. And cells are alive. The nucleus in the cell gives it it's "life" by controlling what the cell does at all times. The nucleus is like our brain or heart, you could say,
The correct answer is Envelope
