Answer:
An amino acid activates the repressor so that the repressor binds to the operator and prevents transcription.
Explanation:
In an operon, promoter is followed by operator which is finally followed by the structural genes to be transcribed. RNA Polymerase binds to the promoter and initiates transcription. A repressor can negatively control the transcription process by binding to the operator so that the RNA Polymerase is not able to move forward and transcription is halted.
For example: in trp operon, tryptophan amino acid binds to the repressor molecule which leads to change in repressor's shape. The repressor is now able to bind to the operator and prevent transcription.
Answer:
The correct answer is A. Cells are the basic unit of life.
<span>Staphylococcus = "staphylo" meaning clusters and "cocci" meaning circular</span>
Answer:
a region on an enzyme that binds to a protein or other substance during a reaction.
Im not really sure , but it might have something to do with polar chemical compound <span />