Gene control & biotech

In gel electrophoresis, the largest DNA fragment will appear

• closest to the starting wells
• farthest from the starting wells
• three quarters away from the starting wells
• it depends on how many fragments there are

Which suspect is likely guilty?

• Suspect #1
• Suspect #2
• Suspect #3

What applications can gel electrophoresis be used for?

• Parental Testing
• Criminal Investigations
• Sequence Endangered Species DNA
• All of the above

Which RE's from above make sticky cuts?

• Alul

• HaeIII

• BamHI

• HindIII

• EcorRI

The functioning of enhancers is an example of

• transcriptional control of gene expression.

• a post-transcriptional mechanism to regulate mRNA.

Which of the following is an example of post-transcriptional control of gene expression?

• The addition of methyl groups to cytosine bases of DNA

• the binding of transcription factors to a promotor

• the removal of introns and alternative splicing of exons

A protein that binds to the operator and blocks the RNA polymerase

• regulator
• repressor
• activator
• corepressor

The "on/off" switch for an operon is called the

• promoter
• repressor
• operator
• gene

What is the name of the stretch of DNA where RNA polymerase binds?

• operator
• promoter
• enhancer
• origin

What is the role of operons in prokaryote gene expression?

• It makes the genes prokaryotes be turned on
• It accounts for the regulation of gene activity in response to the needs of the cells
• To make DNA for the gene
• To make the gene turn of and off