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WorksheetsDNA Replication Practice
Total questions: 16
Worksheet time: 27mins
Name
Class
Date
1.
Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG
ATG TGA CAG
a)
ATG TGA CAG
b)
TAC ACT GTC
c)
GTA AGT GAC
d)
CAT TCA CTG
2.
In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of
a)
cytosine
b)
guanine
c)
thymine
d)
uracil
3.
Which 2 molecules form the sides (backbone) of the DNA ladder?
a)
deoxyribose sugar and adenine
b)
deoxyribose sugar and a hydrogen bond
c)
deoxyribose sugar and the nucleus
d)
deoxyribose sugar and phosphate
4.
The enzyme that unzips the DNA to prepare for replication
a)
helicase
b)
replicase
c)
polymerase
d)
synthase
5.
What is the correct complimentary strand for the following DNA?ATCGAG
a)
TACGAG
b)
ATCGAG
c)
TAGCTG
d)
TAGCTC
6.
In what phase of the cell cycle does DNA replication take place?
a)
G1
b)
S
c)
G2
d)
M
7.
What is responsible for holding the two strands of the DNA double helix together?
a)
hydrogen bonds
b)
alleles
c)
London dispersion forces
d)
deoxyribose sugars
8.
Which enzyme is responsible for adding nucleotides ("The Builder")?
a)
Topoisomerase
b)
DNA Polymerase
c)
Ligase
d)
Primase
9.
Why is it crucial that living things are able to replicate their DNA?
a)
Each cell must have its own DNA
b)
Less copies of DNA are needed when a new cell is created
c)
A cell needs multiple copies of DNA
d)
Only muscle cells need DNA
10.
The two strands of DNA are
a)
Parallel
b)
Antiparallel
c)
Perpendicular
d)
At Right Angles
11.
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 DNA molecules, each with 1 original strand and one new.
12.
Which enzyme fixes the Okazaki fragments in the lagging strand?
a)
Helicase
b)
Polymerase
c)
Ligase
d)
Primerase
13.
Polymerase is able to replicate the new DNA ______ along the leading strand.
a)
continuously
b)
only in short fragments
c)
very slowly
d)
prokaryotically
14.
Based on the diagram, the enzyme (represented in gray) is most likely...
a)
DNA polymerase
b)
DNA Ligase
c)
Nuclease
d)
Helicase
15.
Okazaki fragments are found on the _______________ strand
a)
Leading
b)
Lagging
16.
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)
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