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WorksheetsDNA Replication
Total questions: 25
Worksheet time: 2hrs 47mins
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.
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
5.
A process in which DNA has the unique ability to make an exact copy of itself.
a)
Replication
b)
Translation
c)
Transcription
6.
In what phase of the cell cycle does DNA replication take place?
a)
G1
b)
S
c)
G2
d)
M
7.
Which enzyme is responsible for adding nucleotides?
a)
Topoisomerase
b)
DNA Polymerase
c)
Ligase
d)
Primase
8.
Based on the diagram, the enzyme (represented in gray) is most likely...
a)
DNA polymerase
b)
DNA Ligase
c)
Nuclease
d)
Helicase
9.
Why does DNA replicate?
a)
To create another copy for the new cell
b)
To create a duplicate copy in case the original gets damaged
c)
To create a new copy to replace the damaged original
10.
Which enzyme seals okazaki fragments together on the lagging strand?
a)
Topoisomerase
b)
Helicase
c)
Polymerase
d)
Ligase
11.
What is the backbone of DNA made of?
a)
Nitrogen bases
b)
Amino acids
c)
Double H
d)
Sugar & Phosphate
12.
The separation of the two single strands of DNA creates a ‘Y’ shape?
a)
enzyme
b)
unzip
c)
A replication fork
13.
This enzyme is responsible for creating telomeres added to the ends of DNA
a)
Topoisomerase
b)
Telomerase
c)
DNA Helicase
d)
DNA Primase
14.
This enzyme synthesizes short RNA sequences to guide DNA Polymerase
a)
Primers
b)
DNA Primase
c)
DNA Polymerase
d)
Topoisomerase
15.
In what direction does the Leading strand run?
a)
3' ----> 5'
b)
5' -----> 3'
c)
It doesn't matter
d)
Both directions
16.
Okazaki fragments are found on the _______________ strand
a)
Leading
b)
Lagging
17.
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
18.
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
19.
Which organelle is DNA usually found in?
a)
cell membrane
b)
vacuole
c)
chloroplast
d)
nucleus
20.
After analyzing a sample of DNA, a scientist recorded the data shown in the table. What percentage of the DNA sample is cytosine?
a)
22%
b)
25%
c)
28%
d)
56%
21.
Name this structure
a)
double helix
b)
nucelotide
c)
twisted ladder
d)
hydrogen bond
22.
This picture is illustrating the ____ nature of DNA.
a)
anti-parallel
b)
deoxyribosic
c)
helical
d)
radioactive
23.
Polymerase is able to replicate the new DNA ______ along the leading strand.
a)
continuously
b)
only in short fragments
c)
very slowly
d)
prokaryotically
24.
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
25.
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
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