BIO Exam 3

In prokaryotes, the critical step in regulation is:

(a)  

(a)   : to turn down the expression of genes encoding enzymes that are not needed.

(a)   : to turn up the expression of genes encoding enzymes that are needed.

What type of genetic regulation seems to be the most similar between prokaryotes and eukaryotes?

• 5'-capping regulation

• Poly-A tail addition

• Transcriptional Regulation

• RNA splicing regulation

We can find repressors in:

• Prokaryotes

• Eukaryotes

• Both

Label all parts

g

f

e

d

c

b

a

Degradation of mRNA

Translational Regulation

Regulation of splicing and processsing

Regulation of transcription

Regulation of transport

Protein Modification

Regulation of chromatin remodeling

A regulatory sequence of DNA (that is 10,000 base pairs away
from the gene it regulates) is mutated. The result is that the gene
being regulated is now expressed at a higher rate compared to
when this regulatory sequence was not mutated. What would this
sequence of DNA best be called?

• Core Promoter

• Enhancer

• Silencer

• Activator

• Proximal Promoter Element

Are silencers cis or trans?

• Cis

• Trans

True or False. An enhancer can be found downstream to a promoter.

• True

• False

True or False. Enhancers can found in only one location.

• True

• False