Free Printable Gene Regulation

Worksheets

Gene Regulation

Total questions: 15

Worksheet time: 9mins

Name

Class

Date

Most gene regulation happens at which step along the way?

translation

transcription

signal transduction

DNA replication

what does a promoter do?

it allows a gene to be transcribed

it creates a DNA segment

it is another word for ribosomes

it is another word for RNA

what does a promoter do?

it allows a gene to be transcribed

it creates a DNA segment

it is another word for ribosomes

it is another word for RNA

A protein that binds to the operator and blocks the RNA polymerase

regulator

repressor

activator

corepressor

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

What is the name given to part of a DNA molecule that codes for a protein?

Glucose

Chromosome

Gene

Phosphate

What does the lactose do to the Operon?

Blocks transcription because of the energy it provides

Allows the repressor to be unbind from the Operator.

The lactose binds the lactose and stops transcription

Allows for the transcription to speed

Which of the following statements regarding mRNA is correct?

Exons are included in the protein sequence, while introns are left out

Introns are included in the protein sequence, while exons are left out

Exons and Introns can both be included or left out depending on the protein

Exons and Introns are both part of the mRNA sequence, but only exons are part of the rRNA and tRNA

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.

10.

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.

11.

Prokaryotes regulate gene expression primarily

in order to maintain homeostasis

in response to changing environmental conditions

during development as cells specialize

Prokaryotes do not regulate gene expression. All genes are always on.

12.

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

True

False

13.

An operon is

a genetic on/off switch in prokaryotes

a genetic on/off switch in eukaryotes

a group of related genes and the associated gene switches in prokaryotes

a group of related genes and the associated gene switches in eukaryotes

14.

What molecule can remove a repressor protein from the operator?

a corepressor

an inducer

15.