Gene Regulation Quiz Review

In eukaryotic cells, after transcription, the mRNA

• exits the nucleus unchanged.

• is processed before leaving the nucleus.

• enters the nucleus.

• is replicated before leaving the nucleus.

In eukaryotic cells, the ____________ are segments of mRNA that are cut out of the final transcript.

• promoters

• poly A tails

• exons

• introns

What is added to the processed mRNA transcript in eukaryotic cells to help the transcript attach to ribosomes and to be prevented from being broken down?

• the exon

• the intron

• the poly A tail

• the cap

An operon

• contains an operon.

• is found in bacteria.

• contains structural genes.

• contains a promoter.

Which of the following allows binding of enhancers or repressors to speed or slow down the transcription of genes?

• the operator

• the promoter

• the exon

• the tail

The lac operon is induced or "turned on" when ________________________.

• lactose is present.

• the repressor is present.

• lactose is absent.

• RNA polymerase is absent.

Tags

NGSS.HS-LS3-1

The TATA box is

• a promoter in eukaryotes.

• an operator in prokaryotes.

• an exon in prokaryotes.

• a tail in eukaryotes.

The red letter in the image represents a mutation in the original (normal) DNA sequence TTC. What type of mutation is represented?

• frameshift mutation

• point mutation

• silent mutation

• insertion mutation

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which represents a frameshift mutation

• 
• 
• 
• 

Tags

NGSS.HS-LS3-2

Chromosomal mutations usually occur during

• mitosis.

• interphase.

• meiosis.

• cytokinesis.

Tags

NGSS.HS-LS1-4