WorksheetsOperons
Total questions: 11
Worksheet time: 7mins
Name
Class
Date
1.
Which molecule can we find the promoter and terminator in?
a)
DNA
b)
mRNA
c)
tRNA
d)
polypeptide chain
2.
The "on/off" switch for an operon is called the _________.
a)
promoter
b)
repressor
c)
operator
d)
gene
3.
A protein that binds to the operator and blocks the RNA polymerase
a)
regulator
b)
repressor
c)
activator
d)
corepressor
4.
What is the name of the binding site of RNA polymerase in eukaryotes?
a)
operator
b)
operon
c)
inducer
d)
promoter
5.
What does the repressor protein do?
a)
Allows RNA polymerase to read the gene
b)
Prevents RNA polymerase from reading the gene
c)
Reads the gene
d)
Translates the gene
6.
Which type of operon is shown in the image?
a)
inducible operon
b)
repressible operon
c)
positive control operon
d)
can't determine this from the image
7.
Operons are found in the cells of which of the following types of organisms?
a)
prokaryotes (bacteria)
b)
eukaryotes (plant and animals)
c)
animals only
d)
viruses
8.
What is an operon?
a)
a part of the promoter region of a gene
b)
a part of RNA polymerase
c)
a unit made up of linked genes that code for proteins needed to do a specific task
d)
A protein needed for DNA replication
9.
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
10.
What type of operon is the trp (tryptophan) operon?
a)
inducible
b)
repressible
c)
positive control
d)
promoible
11.
What type of operon is the lac (lactose) operon?
a)
inducible
b)
repressible
c)
positive control
d)
promoible
100 %
