WorksheetsGene Expression Quiz
Total questions: 15
Worksheet time: 12mins
Name
Class
Date
1.
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?
a)
The two different cells become mutated
b)
The proteins expressed in each cell are different
c)
They actually have different DNA in the two types of cells.
d)
The genome of the different cells changes
2.
How is the information in a DNA molecule expressed in an organism?
a)
through plasmids
b)
through RNA polymerase
c)
through recombinant DNA
d)
through proteins
3.
Which of the following best explains the term gene expression?
a)
the production of proteins based on the genetic information in DNA
b)
the suppression of RNA polymerase
c)
the suppression of protein production
d)
the production of lipids based on the genetic information in DNA
4.
The lac operon genes only become expressed if:
a)
lactose binds to the repressor
b)
glucose binds to the repressor
c)
lactose binds to the operator
d)
the repressor binds to the operator
5.
In the lac operon model the genes within the operon will be expressed if:
a)
lactose is absent in the cell
b)
glucose is present in the cell
c)
lactose is present in the cell
6.
If an mRNA molecule has introns and exons in it, where is it?
a)
At a ribosome
b)
In the nucleus
c)
In a prokaryotic cell
d)
could be in the nucleus or the ribosome
7.
what is an operon?
a)
a part of a ribsome
b)
a part of a Rna
c)
a unit made up of linked genes that code for proteins needed to do a specific task
d)
needed for dna replication
8.
what does a promoter do?
a)
it allows a gene to be transcribed
b)
it creates a DNA segment
c)
it is another word for ribosomes
d)
it is another word for RNA
9.
In the lac operon model the genes within the operon will be expressed if:
a)
lactose is absent in the cell
b)
glucose is present in the cell
c)
lactose is present in the cell
10.
The DNA is tightly wrapped around the histone proteins and the gene is methylated.
a)
The gene is silenced.
b)
The gene is active.
c)
It is impossible to tell.
d)
The gene is on and off at various times.
11.
These chemical tags inactivate or silence a gene.
a)
acetyl groups
b)
methyl groups
c)
histones
d)
genes
12.
This term refers to the chemical tags that affect gene function and may be passed on through generations.
a)
genome
b)
methylation
c)
epigenome
d)
autosomes
13.
Why do identical twins begin to look different as they age?
a)
Their environment causes mutations that interfere with gene function.
b)
Mutations accumulate which deactivates histone proteins.
c)
The addition of epigenetic tags result in changes in gene function.
d)
The DMNT gene is silenced.
14.
The difference between DNA code and the epigenome is that the DNA code is
a)
flexible, while the epigenome is fixed for life
b)
fixed for life, while the epigenome is flexible
c)
determined by the environment, while the epigenome is not
d)
determined by one's stress level, while the epigenome is not
15.
Which factor can affect the epigenome?
a)
nutrition
b)
exercise
c)
stress
d)
all of these factors can affect the epigenome
100 %
