Gene Expression and Regulation

A mutation within the promoter region has occurred. What would potentially happen to transcription rate?

• Mutated promoters decrease the rate of transcription.

• Mutated promoters increase the rate of transcription.

• Mutated promoters can increase or decrease the rate of transcription.

• Mutated promoters cease transcription of the adjacent gene.

Tags

NGSS.MS-LS3-1

A lack of this nonprotein molecule would result in the inability of the cell to "turn off" genes:

• Operon

• Inducer

• Promoter

• Repressor

• Corepressor

Tags

NGSS.MS-LS1-2

A mutation in this section of DNA could influence the binding of RNA polymerase to the DNA:

Tags

NGSS.MS-LS3-1

The lactose operon is likely to be transcribed when

• there is more glucose in the cell than lactose.

• the cyclic AMP levels are low.

• there is glucose but no lactose in the cell.

• the cyclic AMP and lactose levels are both high within the cell.

• the cAMP level is high and the lactose level is low.

How does active CAP induce expression of the genes of the lactose operon?

• It terminates production of repressor molecules.

• It degrades the substrate allolactose.

• It stimulates splicing of the encoded genes.

• It stimulates the binding of RNA polymerase to the promoter.

Muscle cells differ from nerve cells mainly because they

• express different genes.

• contain different genes.

• use different genetic codes.

• have unique ribosomes

Tags

NGSS.MS-LS3-1

NGSS.MS-LS1-5

The protein that performs RNA splicing by removing introns and connecting exons is called a(n) ________.

Which of the following is characteristic of the product of the p53 gene?

• It is an activator for other genes.

• It speeds up the cell cycle.

• It causes cell death via apoptosis.

• It allows cells to pass on mutations due to DNA damage.

• It slows down the rate of DNA replication by interfering with the binding of DNA polymerase.

Tags

NGSS.HS-LS1-1

The cancer-causing forms of the Ras protein are involved in which of the following processes?

• Relaying a signal from a growth factor receptor

• DNA replication

• DNA repair

• Cell cycle control system

Attachment of ______ groups to ______ will cause promotion of gene expression due to looser DNA.

• acetyl, DNA

• methyl, DNA

• acetyl, histones

• methyl, histones