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WorksheetsGene Regulation and Expression
Total questions: 12
Worksheet time: 6mins
Name
Class
Date
1.
What is a TATA box? What does a TATA box do?
a)
A short region of DNA that contains a sequence of T and A base pairs. The protein that binds to this site helps position RNA polymerase.
b)
A group of genes that are regulated together.
c)
They control transcription. Some of these regulatory proteins help switch genes on,
while others turn genes off.
while others turn genes off.
d)
Regulate their activities, producing only those genes necessary for the cell
to function.
to function.
2.
The process through which cells become specialized in structure and function is
a)
Transcription
b)
Gene Expression
c)
Differentiation
d)
RNA Interference
3.
What role do homeobox genes play in cell differentiation?
a)
They cut double-stranded loops into microRNA.
b)
They attach to a cluster of proteins to form a silencing complex, which binds to and destroys certain RNA.
c)
They block certain gene expression.
d)
They code for transcription factors that activate other genes important in cell development and differentiation.
4.
Metamorphosis is
a)
A series of transformations from one life stage to another.
b)
The master switch that triggers development and differentiation.
c)
The product of interactions among homeotic genes.
d)
The process by which genetic information is passed from one generation to the next.
5.
In flies, the group of homeobox genes that determines the identities of each segment of a fly's body is the group known as
a)
Silencing Complexes
b)
Promoters
c)
Hox Genes
d)
Operators
6.
What is in the lac operon in E. coli?
a)
Three lactose genes
b)
Two lactose genes
7.
The process of transcription produces a complementary strand of RNA on a DNA template
a)
False
b)
True
8.
As an embryo develops, different sets of genes are regulated by
a)
mRNA and lac repressors.
b)
promoters and operators.
c)
transcription factors and repressors.
d)
operons and operators.
9.
Clusters of Hox genes are found in
a)
nearly all animals.
b)
plants only.
c)
flies and frogs only.
d)
flies only.
10.
The “switches” that trigger particular patterns of development and differentiation in cells and tissues are
a)
mRNA molecules.
b)
silencing complexes.
c)
Dicer enzymes.
d)
master control genes.
11.
What is a Hox gene?
a)
a class of regulatory genes that determine the identity of body parts and regions in an animal embryo.
b)
found in many homeotic genes that regulate development
c)
a group of homeotic genes clustered together that determine the head to tail identity of body parts in animals.
12.
What is it called when these genes are operated together?
a)
Operator region
b)
Lac operon
c)
Lac repressor
d)
Promoter region
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