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DNA Replication

Total questions: 17

Worksheet time: 17mins

Name
Class
Date
1.
Which sequence of DNA bases would pair with this partial strand
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.
In what phase of the cell cycle does DNA replication take place?
a)
G1
b)
S
c)
G2
d)
M
6.
Which enzyme is responsible for adding nucleotides?
a)
Topoisomerase
b)
DNA Polymerase
c)
Ligase
d)
Primase
7.
The process of DNA replication is called semi conservative because it results in
a)
none of these
b)
Two DNA molecules.  One original molecule and one with two new strands
c)
two exact copies with new strands
d)
two identical molecules, each with 1 original strand and one new.
8.
Enzyme that unwinds the DNA
a)
ligase
b)
DNA Polymerase
c)
primase
d)
helicase
9.
Seals the Okazaki fragments together
a)
DNA Polymerase
b)
ligase
c)
helicase
d)
primase
10.
synthesizes a short fragment of RNA that allows DNA polymerase III to bind
a)
ligase
b)
DNA polymerase I
c)
primase
d)
helicase
11.
removes the RNA primer and adds DNA nucleotides to fill in the gap
a)
DNA polymerase III
b)
ligase
c)
primase
d)
DNA polymerase I
12.

direction new nucleotides are synthesized on the new strand

a)

5' to 3' (new nucleotides added to the 3' end)

b)

3' to 5' (new nucleotides added to the 5' end)

c)

3' to 5' (new nucleotides added to the 3' end)

d)

5' to 3' (new nucleotides added to the 5' end)

13.

What are the three components of a nucleotide?

a)

sugar, hydrogen, nitrogen base

b)

sugar, oxygen, nitrogen base

c)

sugar, phosphate, nitrogen base

d)

sugar, phosphate, protein

14.
If a DNA molecule is 18% Guanine which of the following is correct
a)
18% cytosine, 32% adenine, 32% thymine
b)
32% cytosine, 18% adenine, 32% thymine
c)
18% cytosine, 64% adenine, 64% thymine
d)
32% cytosine, 32% adenine, 18% thymine
15.

The enzyme that unwinds a segment of the DNA molecule is...

a)

DNA polymerase

b)

DNA ligase

c)

RNA primase

d)

DNA polymerase III

e)

helicase

16.

DNA replication results in two identical daughter molecules each consisting of one old (original) strand and one newly-synthesized strand.

a)

False that it is False

b)

True that it is False

17.

The point where separation of the DNA occurs is called the replication fork.

a)

True that it is True

b)

True that it is False

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