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DNA Replication

Total questions: 21

Worksheet time: 11mins

Name
Class
Date
1.

Which enzyme is responsible for unwinding the DNA double helix prior to replication?

a)

DNA polymerase I

b)

DNA polymerase III

c)

Helicase

d)

Ligase

2.

Which enzyme fixes the Okazaki fragments in the lagging strand?

a)

Helicase

b)

Polymerase

c)

Ligase

d)

Primerase

3.
If a strand reads:
3' A A A T T T C 5'
The matching strand would read...
a)
5' T T T A A A G 3'
b)
3' T T T A A A G 5'
c)
5' A A A T T T C 3'
d)
3' U U U A A A G 5'
4.

What are the gaps between the newly synthesized DNA on the lagging strand called?

a)

Okazaki fragments

b)

Polymer gaps

c)

Helicase fragments

d)

Acidic gaps

5.
This picture is illustrating the ____ nature of DNA.
a)
anti-parallel
b)
deoxyribosic
c)
helical
d)
radioactive
6.

3' and 5' refer to...

a)

How effectively the helicase works

b)

What direction the nucleotides are pointing

c)

Where the RNA primer attaches

d)

Okazaki's famous experiment

7.

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

8.
Polymerase is able to replicate the new DNA ______ along the leading strand.
a)
continuously
b)
only in short fragments
c)
very slowly
d)
prokaryotically
9.

A DNA nucleotide contains all of the following, except...

a)

Deoxyribose

b)

Phosphate group

c)

Nitrogenous base

d)

Cholesterol

10.

What is the shape of DNA?

a)

Double helix

b)

Triple helix

c)

Flat, bilayer

d)

Three-pronged rigid ladder

11.
DNA replication turns one strand of DNA into two new strands of DNA. What percent of each new strand is the old strand?
a)
Half of each new DNA is the old DNA
b)
The old strand of DNA was digested, so none
c)
The new DNA is entirely made up of the old DNA
d)
About every sixth base comes from the old DNA
12.
Sometimes, DNA is called "semi-conservative." Why might this be?
a)
The old strand is "conserved" and used to make the new strands
b)
Uracil is "conserved" in that it is only used to make the new strands
c)
ATP is "conserved" via the usage of facilitated diffusion
d)
Ligase is "conserved" in that it is denatured by the process
13.

Match he nucleotide with its complementary nucleotide. (DNA to DNA).


Adenine -

a)

Thymine

b)

Guanine

c)

Cytosine

14.

Match he nucleotide with its complementary nucleotide. (DNA to DNA).


Cytosine-

a)

Thymine

b)

Guanine

c)

Adenine

15.

Which enzyme is responsible for adding the free nucleotides to the replicating DNA? ​

a)

DNA Helicase

b)

DNA Ligase

c)

DNA polyermase

d)

RNA Polymerase

16.

Which letter in the picture below depicts the leading strand in DNA replication?

a)

A

b)

C

c)

B

d)

None of the above

17.

Which letter in the picture below depicts the lagging strand in DNA replication?

a)

A

b)

C

c)

B

d)

None of the above

18.

Which letter in the picture below depicts the replication fork in DNA replication?

a)

A

b)

C

c)

B

d)

None of the above

19.

DNA replication runs from ______' to _____' and is said to be ______________________

a)

5, 3, antiparallel

b)

3, 5, antiparallel

c)

5, 3, parallel

d)

3, 5, parallel

20.

Okazaki fragments appear on which strand of DNA during DNA replication?

a)

lagging

b)

leading

21.

DNA replication results in

a)

2 completely new DNA molecules

b)

2 DNA molecules that each contain a strand of the original

c)

1 new DNA molecule and 1 old

d)

1 new molecule of DNA

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