Gene Regulation - Assessment

1.

Multiple Choice

30 sec

1 pt

Most gene regulation happens at which step along the way?

translation

transcription

signal transduction

DNA replication

2.

Multiple Choice

1 min

1 pt

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

3.

Multiple Choice

45 sec

1 pt

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

regulator

repressor

activator

corepressor

4.

Multiple Choice

45 sec

1 pt

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

5.

Multiple Choice

30 sec

1 pt

Why are insertion and deletion mutations so harmful?

They change all of the codons from the mutation on down the line, which changes the amino acid sequence

They insert things that an organism doesn't need.

They often delete things that organisms need.

Insertion and deletions are not any more harmful than substitution mutations.

6.

Multiple Choice

30 sec

1 pt

Identify the SUBSTITUTION mutation from the following DNA sequence:
ATG CCA AAT

ATG TCA AAT

ATG CCT AAA T

ATC CA AT

ATG CCA AAT

7.

Multiple Choice

45 sec

1 pt

In eukaryotes, proteins that help the RNA polymerase bind to the regulatory region for transcription are called ____________.

transcription factors

topoisomerase

regulatory genes

activators

8.

Multiple Choice

45 sec

1 pt

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

Glucose

Chromosome

Gene

Phosphate

9.

Multiple Choice

45 sec

1 pt

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

10.

Multiple Choice

45 sec

1 pt

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

11.

Multiple Choice

45 sec

1 pt

How can a person's muscle cells have the same exact DNA sequences as their nerve cells even though the 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

12.

Multiple Choice

45 sec

1 pt

What is the role of operons in prokaryote gene expression?

It makes the genes prokaryotes be turned on

It accounts for the regulation of gene activity in response to the needs of the cells

To make DNA for the gene

To make the gene turn of and off

13.

Multiple Choice

30 sec

1 pt

What structure of this molecule binds with the mRNA molecule?

Amino Acid

tRNA

Anticodon

Codon

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