AP Bio Insta-Review Topic 6.5*: Regulation of Gene Expression

Front

What are transcription factors?

Back

Molecules that bind to enhance/inhibit transcription.

Front

What binds to the promoter?

Back

RNA polymerase.

Front

Where does the repressor in an operon bind?

Back

Operator.

Front

Do all somatic (body) cells have the same genetic information?

Back

True.

Front

What is the lac operon?

Back

Inducible operon so starts off and is activated by lactose.

Front

What is gene expression?

Back

The process by which information from a gene is used to synthesize a functional gene product, usually a protein.

Front

What role do enhancers play in gene regulation?

Back

Enhancers are DNA sequences that increase the likelihood of transcription of a particular gene.

Front

What is the function of a promoter?

Back

A promoter is a region of DNA that initiates transcription of a particular gene.

Front

What is an operon?

Back

A cluster of genes under the control of a single promoter, typically found in prokaryotes.

Front

What is the difference between an inducible and repressible operon?

Back

Inducible operons are usually off and can be turned on, while repressible operons are usually on and can be turned off.