WorksheetsUnit 3D: DNA Structure and Replication
Total questions: 17
Worksheet time: 17mins
Name
Class
Date
1.
What does DNA stand for?
a)
Deoxyribonucleic acid
b)
Denitrogenous acid
c)
Deribonucleic acid
d)
Diribonucleic acid
2.
Which of the following best describes a DNA molecule?
a)
double helix
b)
contains ribose
c)
made of amino acids
d)
contains Uracil
3.
Which organelle is DNA usually found in?
a)
cell membrane
b)
vacuole
c)
ribosome
d)
nucleus
4.
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
5.
What are the nucleotides made of?
a)
Sugar, Phosphate, nitrogen base
b)
Phosphate, Adenine, nitrogen base
c)
Thymine, Adenine, Cytomine
d)
Phosphate, Nitrogen, Adenine
6.
Look at the image of DNA, what do the circles represent?
a)
Sugars
b)
Phosphates
c)
Bases
d)
Covalent Bonds
7.
Look at the image of DNA, there are molecules with the letters A & G in them, what are these molecules?
a)
Sugars
b)
Phosphates
c)
Nitrogen containing bases
d)
Covalent Bonds
8.
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
9.
Nucleotides are made up of a sugar, phosphate, and..?
a)
nitrogenous base
b)
nucleic acid
c)
cholesterol
d)
fatty acid
10.
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
11.
Guanine bonds with ______________.
a)
Adenine
b)
Guanine
c)
Cytosine
d)
Thymine
12.
Which of the following is NOT a nitrogenous base found in DNA?
a)
Adenine
b)
Glycine
c)
Thymine
d)
Cytosine
13.
Which enzyme is responsible for adding nucleotides?
a)
Topoisomerase
b)
DNA Polymerase
c)
Ligase
d)
Primase
14.
What is the correct order of steps for DNA replication?
a)
Unwind, unzip, bring in new nucleotides, wind back up
b)
Unzip, unwind, bring in new nucleotides, wind back up
c)
Wind back up, unzip, unwind, bring in new nucleotides
d)
Bring in new nucleotides, unwind, unzip, wind back up
15.
What does the DNA helicase do during replication?
a)
It builds the new DNA strand
b)
Glues pieces of DNA nucleotide together
c)
Unwinds and unzips the DNA
16.
What does it mean to say DNA replication is "semi-conservative?"
a)
A new strand is built from an original strand
b)
A new strand is built from nothing
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
100 %
