WorksheetsUnit 3: Lesson 4 - DNA Replication
Total questions: 12
Worksheet time: 25mins
Name
Class
Date
1.
The enzyme that unzips the DNA to prepare for replication
a)
helicase
b)
replicase
c)
polymerase
d)
synthase
2.
DNA replication results in two DNA molecules,
a)
each one with two original strands
b)
each one with two new strands
c)
each one with one new strand and one original strand
d)
one with two new strands and the other with two original strands
3.
Polymerase is able to replicate the new DNA ______ along the leading strand.
a)
continuously
b)
only in short fragments
c)
very slowly
d)
prokaryotically
4.
DNA replication turns one strand of DNA into two new strands of DNA. What percent of each new strand is the old strand?
a)
Half of each new DNA is the old DNA
b)
The old strand of DNA was digested, so none
c)
The new DNA is entirely made up of the old DNA
d)
About every sixth base comes from the old DNA
5.
Which enzyme is responsible for adding nucleotides?
a)
Topoisomerase
b)
DNA Polymerase
c)
Ligase
d)
Primase
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.
Okazaki fragments are found on the _______________ strand
a)
Leading
b)
Lagging
9.
DNA is built in this direction
a)
5' to 3' (new nucleotides added to the 3' end)
b)
3' to 5' (new nucleotides added to the 5' end)
c)
3' to 5' (new nucleotides added to the 3' end)
d)
5' to 3' (new nucleotides added to the 5' end)
10.
DNA Replication occurs during which phase of the cell cycle?
a)
G 1 phase
b)
S phase
c)
G 2 phase
d)
Mitotic phase
11.
order of replication
a)
3, 2, 1, 4
b)
2, 1, 4, 3
c)
2, 3, 1, 4
d)
3, 4, 1, 2
12.
Why does DNA replicate?
a)
To create a duplicate copy in case the original gets damaged
b)
New cells will have a copy of the DNA
c)
To create a new copy to replace the damaged original
100 %
