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DNA Replication

Total questions: 20

Worksheet time: 18mins

Name
Class
Date
1.
The enzyme that unzips the DNA to prepare for replication
a)
helicase
b)
replicase
c)
polymerase
d)
synthase
2.
In what phase of the cell cycle does DNA replication take place?
a)
G1
b)
S
c)
G2
d)
M
3.
Okazaki fragments form on the:
a)
lagging strand
b)
leading strand
c)
base-pairs
d)
5' end
4.
During replication, what enzyme adds complimentary bases?
a)
helicase
b)
synthesase
c)
ligase
d)
polymerase
5.

Which enzyme is responsible for forming the covalent bonds between the Okazaki fragments?

a)

Ligase

b)

Helicase

c)

DNA Polymerase

d)

Primase

6.

Direction that DNA is replicated

a)

3' to 5'

b)

5' to 3'

7.

H is the

a)

leading strand

b)

lagging strand

c)

parent strand

d)

none of these

8.

A is the

a)

Primase

b)

Helicase

c)

Polymerase

d)

Ligase

9.
What are the 4 nitrogen bases?
a)
adenine, thymine, cytoplasm, and guanine
b)
adenine, thymine cytosine, and guanine
c)
adenine, thymine, cytosine, and gylcerol
d)
adenine, thymine, cytosine, and glucose
10.
Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG
a)
ATG TGA CAG
b)
TAC ACT GTC
c)
GTA AGT GAC
d)
CAT TCA CTG
11.
Which shows the correct complementary base pairing for DNA?
a)
C-A, T-G
b)
A-G, C-T
c)
C-G, U-A
d)
T-A, G-C
12.

The building block of nucleic acids are nucleotides.  Nucleotides are composed of a sugar, a phosphate group, and a _________________ containing base.

a)
oxygen
b)
hydrogen
c)
nitrogen
d)
carbon
13.
The sugar in DNA is ?
a)
sucrose
b)
glucose
c)
deoxyribose
d)
fructose
14.
The two strands of nitrogenous bases in DNA are joined by which type of bond?
a)
polar bonds
b)
ionic bonds
c)
covalent bonds
d)
hydrogen bonds
15.
X outlines a(n) ___________.
a)
amino acid
b)
nitrogen base 
c)
nucleotide
d)
nitrogen base pair
16.
Which series is arranged in order from largest to smallest in size?
a)

gene, chromosome, nucleus, cell, nucleotide

b)

cell, nucleus, chromosome, gene, nucleotide

c)

nucleotide, chromosome, cell, nucleus

d)

cell, gene, nucleotide, nucleus, chromosome

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 A?
a)
Leading strand
b)
Lagging strand
c)
Okazaki Fragments
d)
DNA plymerase
19.

Which of the following describes the 5' end?

a)

phosphate attached to the pentose sugar

b)

hydroxyl attached to the pentose sugar

c)

nitrogenous base attached to the pentose sugar

d)

the next nucleotide attached to the pentose sugar

20.

Which of the following describes why there is a leading and lagging strand in DNA replication?

a)

DNA is antiparallel

b)

DNA is negatively charged

c)

DNA has a phosphate group

d)

DNA has hydrogen bonds

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