Unit 6 AP Biology Insta-Review (Gene Expression and Regulation)

Front

What are transcription factors?

Back

Molecules that bind DNA to enhance/inhibit transcription.

Front

What enzyme is responsible for sealing phosphodiester linkages?

Back

Ligase

Front

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

Back

True

Front

What is the primary source of genetic information?

Back

DNA/RNA

Front

What type of operon is the trp operon?

Back

Repressible operon – starts ON and is deactivated by trp.

Front

What is the role of RNA polymerase in transcription?

Back

Synthesizes RNA from a DNA template.

Front

What is the function of helicase in DNA replication?

Back

Unwinds the DNA double helix.

Front

What is the difference between an inducible and a repressible operon?

Back

Inducible operons are activated by a substrate, while repressible operons are inhibited by a product.

Front

What is the significance of the promoter region in gene expression?

Back

It is the site where RNA polymerase binds to initiate transcription.

Front

What is the function of ribosomes in protein synthesis?

Back

They facilitate the translation of mRNA into a polypeptide chain.