AP Bio Gene Regulation

What are the coding segments of a stretch of eukaryotic DNA called?

• introns

• exons

What are the transcription factors?

• Molecules that provide ATP to transcription unit

• Molecules that synthesize RNA during transcription 

• Molecules that bring amino acids to the transcription unit

• Molecules that bind to enhance/inhibit transcription. 

Where does the repressor in an operon bind?

• Operator

• Promoter

• Regulatory sequence

• TATA box

If the repressor is bound to the operator…

• RNA polymerase is able to bind, the operon is off

• RNA polymerase is able to bind, the operon is on

• RNA polymerase is unable to bind, the operon is off

• RNA polymerase is unable to bind, the operon is on

The lac operon is…

• Inducible operon so starts off and is activated by lactose

• Inducible operon so starts on and is deactivated by lactose

• Repressible operon so starts off and is activated by lactose

• Repressible operon so starts on and is deactivated by lactose

What types of cells have operons? 

• Eukaryotes

• Prokaryotes

• Neither eukaryotes nor prokaryotes

• Both eukaryotes and prokaryotes

What makes up the TATA box?

• Adenine & Cytosine

• Cytosine & Guanine

• Guanine & Thymine

• Thymine & Adenine

Where is the TATA box located?

• Near the introns

• Near the exons

• Near the poly adenylation sequence

• Near the promoter

Describe the effect of adding methyl group to DNA.

• Decreases condensation which decreases transcription

• Decreases condensation which increases transcription

• Increases condensation which decreases transcription

• Increases condensation which increases transcription

What is the role of the promoter in gene regulation?

• Initiates transcription by providing a binding site for RNA polymerase

• Binds to repressor proteins to inhibit transcription

• Serves as a site for ribosome assembly

• Marks the end of a gene sequence