WorksheetsDNA Replication
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
Which sequence of DNA bases would pair with this partial strand
CAT TCA CTG
CAT TCA CTG
a)
ATG TGA CAG
b)
TAC ACT GTC
c)
GTA AGT GAC
d)
CAT TCA CTG
2.
Which of the following units are repeatedly joined together to form a strand of DNA?
a)
amino acids
b)
nucleotides
c)
fatty acids
d)
polysaccharides
3.
The enzyme that unwinds the DNA to prepare for replication
a)
helicase
b)
replicase
c)
polymerase
d)
synthase
4.
Which enzyme is responsible for adding nucleotides?
a)
Topoisomerase
b)
DNA Polymerase
c)
Ligase
d)
Primase
5.
The process of DNA replication is called semi conservative because it results in
a)
none of these
b)
Two DNA molecules. One original molecule and one with two new strands
c)
two exact copies with new strands
d)
two identical molecules, each with 1 original strand and one new.
6.
Based on the diagram, how many origins of replication are represented?
a)
1
b)
2
c)
3
d)
4
7.
Based on the diagram, the enzyme (represented in gray) is most likely...
a)
DNA polymerase
b)
DNA Ligase
c)
Nuclease
d)
Helicase
8.
Which enzyme fixes the Okazaki fragments in the lagging strand?
a)
Helicase
b)
Polymerase
c)
Ligase
d)
Primerase
9.
What are the gaps between the newly synthesized DNA on the lagging strand called?
a)
Okazaki fragments
b)
Polymer gaps
c)
Helicase fragments
d)
Acidic gaps
10.
This picture is illustrating the ____ nature of DNA.
a)
anti-parallel
b)
deoxyribosic
c)
helical
d)
radioactive
11.
3' and 5' refer to...
a)
How effectively the helicase works
b)
What direction the nucleotides are pointing
c)
Where the RNA primer attaches
d)
Okazaki's famous experiment
12.
The enzyme that splits open the DNA creates what's called a fork - where the DNA separates into the lagging strand and the ______ strand.
a)
leading
b)
leveraging
c)
Okazaki
d)
ligase
13.
What is the shape of DNA?
a)
Double helix
b)
Triple helix
c)
Flat, bilayer
d)
Three-pronged rigid ladder
14.
DNA polymerase moves in the _________ to ____________ direction
a)
3' to 5'
b)
easiest
c)
5" to 3"
d)
9 to 5
15.
Site where replication begins
a)
Polymerase action site
b)
Replication fork
c)
Replication Origin
d)
In the front
16.
The new DNA strand formed after DNA replication is an exact copy of its parent strand
a)
True
b)
False
17.
Proteins that DNA winds itself around to for Chromosomes
a)
Histone
b)
Double Helix
c)
Chromatin
d)
Chromatin
18.
If the percentage of DNA is made of 30% Thymine, what is the correct percentage of Guanine?
a)
30
b)
15
c)
20
d)
60
19.
The bonds that hold the two strands of DNA together come from...
a)
the attraction of phosphate groups
b)
strong bonds between bases and sugars
c)
carbon to carbon bonds in the sugar
d)
weak hydrogen bonds between the bases
20.
Why is DNA important?
a)
it is very small and very complicated
b)
it's in everything
c)
it serves as the blueprint for traits of all living things
d)
because we eat it every day for energy
100 %
