WorksheetsDNA and Molecular Biology
Total questions: 15
Worksheet time: 23mins
Name
Class
Date
1.
What is the process for making another DNA copy of a chromosome?
a)
replication
b)
transcription
c)
translation
d)
chromatin
2.
Which choices describe DNA replication?
a)
semiconservative
b)
produces two pieces of DNA identical to the original
c)
products are half original and half new
d)
all of the above
3.
What is the enzyme responsible for DNA replication?
a)
DNA polymerase
b)
RNA polymerase
c)
ribosome
d)
nucleolus
4.
When in the cell cycle is DNA replication?
a)
S phase of interphase
b)
Go of interphase
c)
mitosis
d)
meiosis
5.
Which enzyme is responsible for adding nucleotides?
a)
Ligase
b)
Helicase
c)
DNA polymerase I
d)
DNA polymerase III
6.
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
7.
The enzyme that unwinds the DNA to prepare for replication
a)
helicase
b)
replicase
c)
polymerase
d)
synthase
8.
Based on the diagram, how many origins of replication are represented?
a)
1
b)
2
c)
3
d)
4
9.
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
10.
The DNA nucleotide is composed of three parts. Which two components make up the nucleotide backbone?
a)
ribose sugar and base
b)
ribose sugar and phosphate group
c)
nitrogen base and deoxyribose sugar
d)
deoxyribose sugar and phosphate group
11.
Describes the twisted ladder-like shape of a DNA molecule
a)
Nitrogen Base
b)
Hexagon
c)
Double Helix
12.
Which enzyme fixes the Okazaki fragments in the lagging strand?
a)
Helicase
b)
Polymerase
c)
Ligase
d)
Primerase
13.
This picture is illustrating the ____ nature of DNA.
a)
anti-parallel
b)
deoxyribosic
c)
helical
d)
radioactive
14.
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
15.
The separation of the two single strands of DNA creates a ‘Y’ shape?
a)
enzyme
b)
unzip
c)
A replication fork
100 %
