Match each term with its definition.

1) a DNA sequence located near the start of a gene that RNA polymerase binds to initiate transcription
2) a regulatory protein that blocks transcription by binding to the operator site
3) a transcriptional element that blocks the signal between enhancers and promoters
4) a gene that controls the expression of one or more genes by promoting or inhibiting transcription
5) a small molecule that activates transcription by inhibiting the action of a repressor protein
6) a short DNA sequence that can be recognized by a repressor protein

a) insulator
b) operator
c) repressor
d) inducer
e) regulatory gene
f) promoter

The correct terms have been inserted before the description that matches it:

Promoter

1) a DNA sequence located near the start of a gene that RNA polymerase binds to initiate transcription

Repressor

2) a regulatory protein that blocks transcription by binding to the operator site

Insulator

3) a transcriptional element that blocks the signal between enhancers and promoters

Operator

4) a gene that controls the expression of one or more genes by promoting or inhibiting transcription

Inducer

5) a small molecule that activates transcription by inhibiting the action of a repressor protein

Regulatory Gene

6) a short DNA sequence that can be recognized by a repressor protein

Notice the difference between genes and proteins, it is by working together that the cell is able to control these functions. A defect in any of these could possibly prevent the normal functioning of the cell.

Hope that answers the question, have a great day!

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?