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DNA replication

Total questions: 20

Worksheet time: 5hrs 46mins

Name
Class
Date
1.

This enzyme is capable of breaking Hydrogen bonds found between the bases of DNA

a)

Topoisomerase

b)

DNA Helicase

c)

DNA Polymerase

d)

Exonuclease

2.

This enzyme is used to remove short RNA bases

a)

Topoisomerase

b)

DNA Helicase

c)

Exonuclease

d)

Telomerase

3.
What is the purpose of DNA replication?
a)
Cut the DNA 
b)
Make more cells
c)
Apoptosis
d)
Duplicate the DNA
4.
Which enzyme seals okazaki fragments together on the lagging strand?
a)
Topoisomerase
b)
Helicase
c)
Polymerase
d)
Ligase
5.
What do we call DNA replication since new DNA has 1 parent strand and 1 new strand?
a)
Conservative 
b)
Semiconservative 
c)
Dispersive
6.
What is the backbone of DNA made of?
a)
Nitrogen bases
b)
Amino acids
c)
Double H
d)
Sugar & Phosphate
7.
Why is it crucial that living things are able to replicate their DNA?
a)
Each cell must have its own DNA
b)
Less copies of DNA are needed when a new cell is created
c)
A cell needs multiple copies of DNA
d)
Only muscle cells need DNA 
8.
Which enzyme is responsible for adding nucleotides?
a)
Topoisomerase
b)
DNA Polymerase
c)
Ligase
d)
Primase
9.

The separation of the two single strands of DNA creates a ‘Y’ shape?

a)

enzyme

b)

unzip

c)

A replication fork

10.

This enzyme helps helicase unzip DNA by relieving supercoiling

a)

Topoisomerase

b)

Exonuclease

c)

DNA Primase

d)

DNA Polymerase

11.

This enzyme is responsible for creating telomeres added to the ends of DNA

a)

Topoisomerase

b)

Telomerase

c)

DNA Helicase

d)

DNA Primase

12.

This enzyme synthesizes short RNA sequences to guide DNA Polymerase

a)

Primers

b)

DNA Primase

c)

DNA Polymerase

d)

Topoisomerase

13.

What is the LAST step of the completion of DNA replication?

a)

Telomeres are added to ends of DNA

b)

Ligase glues Okazaki fragments

c)

DNA polymerase proofreads

d)

Topoisomerase relieves supercoiling

14.

Which enzyme is responsible for checking DNA for errors, and fixing it?

a)

DNA Polymerase

b)

DNA Primase

c)

DNA Helicase

d)

RNA Polymerase

15.

In what direction does the Leading strand run?

a)

3' ----> 5'

b)

5' -----> 3'

c)

It doesn't matter

d)

Both directions

16.

Each DNA molecule created contain one NEW strand and one OLD strand

a)

True

b)

False

17.

Okazaki fragments are found on the _______________ strand

a)

Leading

b)

Lagging

18.

This enzyme ONLY works in one direction which is 5'------> 3'

a)

DNA Polymerase

b)

DNA Helicase

c)

Topoisomerase

d)

Telomerase

19.

What is the LAST enzyme used in DNA replication

a)

Topoisomerase

b)

Telomerase

c)

DNA Polymerase

d)

DNA Ligase

20.

Okazaki fragments are unified into a single continuous strand by the use of this enzyme

a)

DNA Helicase

b)

DNA Ligase

c)

Topoisomerase

d)

Telomerase