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WorksheetsDNA Replication (R)
Total questions: 20
Worksheet time: 20mins
Name
Class
Date
1.
Which enzyme has the job of unzipping the double helix?
a)
Helicase
b)
Polymerase
c)
Ligase
d)
Primerase
2.
What is the shape of DNA?
a)
Double helix
b)
Triple helix
c)
Flat, bilayer
d)
Three-pronged rigid ladder
3.
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
4.
Sometimes, DNA is called "semi-conservative." Why might this be?
a)
The old strand is "conserved" and used to make the new strands
b)
Uracil is "conserved" in that it is only used to make the new strands
c)
ATP is "conserved" via the usage of facilitated diffusion
d)
Ligase is "conserved" in that it is denatured by the process
5.
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
6.
order of replication
a)
3, 4, 2, 1
b)
3, 1, 4, 2
c)
2, 1, 4, 3
d)
3, 4, 1, 2
7.
A process in which DNA has the unique ability to make an exact copy of itself.
a)
Replication
b)
Translation
c)
Transcription
8.
Place the following in sequential order
1. Recoil
2. Straightens the double helix
3. Breaks Hydrogen bonds
4. Adds Free nucleotides
1. Recoil
2. Straightens the double helix
3. Breaks Hydrogen bonds
4. Adds Free nucleotides
a)
1, 2, 3, 4
b)
3, 4, 2, 1
c)
3, 2, 4, 1
d)
2, 3, 4, 1
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.
A DNA nucleotide contains all of the following, except...
a)
Deoxyribose
b)
Phosphate group
c)
Nitrogenous base
d)
Cholesterol
11.
Match he nucleotide with its complementary nucleotide. (DNA to DNA).
Adenine -
a)
Thymine
b)
Guanine
c)
Cytosine
12.
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
13.
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
14.
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%
15.
Name this structure
a)
double helix
b)
nucelotide
c)
twisted ladder
d)
hydrogen bond
16.
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
17.
Which enzyme is responsible for adding nucleotides?
a)
Topoisomerase
b)
DNA Polymerase
c)
Ligase
d)
Primase
18.
The enzyme that unzips the 2 strands of DNA is called DNA (a) .
19.
The enzyme that adds nucleotides to the unzipped strands of DNA is called DNA (a) .
20.
Which 2 molecules forms the sides (backbone) of the DNA ladder?
a)
deoxyribose and adenine
b)
deoxyribose and a hydrogen bond
c)
sugar and the nucleus
d)
deoxyribose (sugar) and phosphate
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