Imagine That You Are Studying the Control of Fi- Globin

Multiple Choice

Imagine that you are studying the control of fi- globin gene expression in immature red blood cells mature red blood cells contain fi- globin protein, but lack a nucleus and, therefore, the fi- globin gene) . If you deleted a sequence of DNA outside the protein- coding region of the fi- globin gene and found that this increased the rate of transcription, the deleted sequence likely functions as an)

A) enhancer.
B) promoter.
C) silencer.
D) promoter- proximal element.
E) any of the above.