Unit 6: Gene Regulation & Biotechnology

Identify which molecules bind to the promoter region

• Ligase

• Topoisomerase

• DNA polymerase

• RNA polymerase

How can a person's muscle cells have the same exact DNA sequences as their nerve cells even though they look and perform completely different?

• The two different cells become mutated

• The proteins expressed in each cell are different

• They actually have different DNA in the two types of cells.

• The genome of the different cells changes

Tags

NGSS.HS-LS3-2

NGSS.HS-LS1-1

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 promoter
• the removal of introns and splicing together of exons
• gene amplification contributing to cancer

The parts of a gene that do NOT code for amino acids in a protein are called

• introns
• exons
• codons
• anticodons

How does the DNA in a prokaryote differ from a eukaryote?

• Prokaryote has circular DNA, Eukaryotes has linear DNA

• Prokaryote has single stranded DNA, Eukaryotes has double stranded DNA

• Prokaryote has linear DNA, Eukaryotes has circular DNA

• Prokaryote has double stranded DNA, Eukaryotes has single stranded DNA

In the lac operon model the genes within the operon will be expressed if:

• lactose is absent in the cell
• glucose is present in the cell
• lactose is present in the cell

In eukaryotes, a cluster of proteins (RNA polymerase II, mediator proteins, etc.) that assemble on the promoter is called the

• transcription initiation complex

• control element

• activator

• protein blobby thing

All the genes in both a prokaryotic cell and a eukaryotic cell are expressed at the same time.

• True

• False

In an operon, a sequence of DNA where RNA polymerase binds prior to transcription.

• operator

• promoter

• initiator

• repressor

In an operon, the sequence of DNA that serves as a binding site for a repressor, and thereby regulates the expression of structural genes.

• promoter

• inducer

• operator

• repressor