Gene Expression

Question 1

What is an operon

Answer 1

A group of prokaryotic genes with a single promoter

Question 2

What is a Negative Regulator

Answer 2

Binds to the operator to silence the trp expression

Question 3

Positive regulators

Answer 3

that turn on genes

Question 4

Explain the components of operon

Answer 4

Promoter -> Binds to RNA polymerase
Operator -> where positive (Inducers) and negative (Repressible) bind to
Structural genes -> what codes for

Question 5

Promoters for Eukaryote

Answer 5

Promoters is where transcription start site

Question 6

Enhancers

Answer 6

cis-acting elements required for transcription of a gene

Question 7

What is a Coactivator

Answer 7

Binds to activator protein which then binds to DNA

Question 8

What is Corepressor

Answer 8

Binds to repressor protein which binds to DNA

Question 9

RNA processing

Answer 9

-5 cap 
Protects mRNA 
-3 poly-A tail 
cleavages at cleavage site
mRNA splicing
Pre mRNA splicing by spliceosomes

Question 10

When a protein is tagged by a signaling protein it enters a __________ to be degraded by _______

Answer 10

Proteasome, protease