Regulation of Gene Expression

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

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. 

A process of turning genes on and off.

• gene mutation

• gene regulation

• gene process

• gene replication

When a gene is activated _________ binds to the DNA at the start of the gene and moves along the DNA to create mRNA

• keritanase

• RNA polymerase

• TAQ polymerase

• catalyase

In the absence of an inducer, gene expression of an inducible promoter will be

• on

• off

• halfway on

When present in the cell, IPTG binds to ​ (a)   which can then no longer bind to the ​ (b)   . Thus, ​ (c)   will be able to be expressed.​

• T7 expression host

• inducible promoter

• lac repressor

• lac promoter

• T7 polymerase

• plasmid

• GFP

What is the purpose of transcription?

• to create mRNA so that a specific protein can be coded for

• to aide the cell in creating cellular energy (ATP)

• to bind amino acids together to form a polypeptide

• to ensure that daughter cells have the same DNA as the mother cell

Tags

NGSS.HS-LS1-1

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