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DNA revision

Total questions: 45

Worksheet time: 2hrs 40mins

Name
Class
Date
1.
When does replication occur?
a)
G0 phase
b)
G1 phase
c)
G2 phase
d)
S phase
2.
Name this structure
a)
double helix
b)
nucelotide
c)
twisted ladder
d)
hydrogen bond
3.
Describes the twisted ladder-like shape of a DNA molecule
a)
Nitrogen Base
b)
Hexagon
c)
Double Helix
4.
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
5.
A process in which DNA has the unique ability to make an exact copy of itself.
a)
Replication
b)
Translation
c)
Transcription
6.
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
7.
Replicate the following strand of DNA: 
AATCATGGA
a)
AATCATGGA
b)
TTAGTACCT
c)
UUAGUACCU
d)
GGATAUCUA
8.

The picture below shows the steps of DNA replication beginning with step one and ending with step three.


​Because you are reusing the old, or parent, DNA strand DNA replication is said to be

a)

Semi- Conservative

b)

Semi-discontinuous

c)

Continuous

d)

Fully-Conserveative

9.

The picture below shows an enzyme unwinding and unzipping DNA.

​

​What is the name of this enzyme?

a)

DNA Helicase

b)

DNA Ligase

c)

DNA polyermase

d)

RNA Polymerase

10.

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

11.
What is the shape of DNA?
a)
Double helix
b)
Triple helix
c)
Flat, bilayer
d)
Three-pronged rigid ladder
12.
What is the purpose of DNA replication?
a)
Cut the DNA 
b)
Make more cells
c)
Apoptosis
d)
Duplicate the DNA
13.
What is the backbone of DNA made of?
a)
Nitrogen bases
b)
Amino acids
c)
Double H
d)
Sugar & Phosphate
14.
In what phase of the cell cycle does DNA replication take place?
a)
G1
b)
S
c)
G2
d)
M
15.
Nitrogenous bases are joined by which type of bond?
a)
polar bonds
b)
ionic bonds
c)
covalent bonds
d)
hydrogen bonds
16.
In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of
a)
cytosine
b)
guanine
c)
thymine
d)
uracil
17.
What sugar is in DNA?
a)
deoxyribose
b)
ribose
c)
oxyribose
d)
deoxyose
18.
Which organelle is DNA usually found in?
a)
cell membrane
b)
vacuole
c)
chloroplast
d)
nucleus
19.
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
20.

The picture below shows an enzyme unwinding and unzipping DNA.

​

​What is the name of this enzyme?

a)

Helicase

b)

Ligase

c)

DNA Pol I

d)

Topoisomerase

21.

_ bonds hold the base pairs together.

(a)  

22.

Which molecules make up the rungs of the DNA molecule?

a)

nitrogen bases

b)

phosphates

c)

proteins

d)

sugars

23.

Cytosine (C) pairs with _ in a DNA molecule.

(a)  

24.

When does DNA replication take place within the cell cycle?

a)

Interphase

b)

Mitosis

c)

Meiosis

d)

Cytokinesis

25.

What does DNA stand for?

(a)  

26.

What is the final product of DNA replication?

a)

one identical DNA molecule

b)

two identical DNA molceules

c)

two unique DNA molecules

d)

four identical DNA molecules

27.
Who is responsible for producing this image?
a)
Francis Crick
b)
James Watson
c)
Rosalind Franklin
d)
Watson and Crick
28.
The term used to describe DNA Replication is:
a)
Semi-Conservative
b)
Conservative
c)
AntiParallel
d)
Dispersive
29.
Which nitrogen base pairs with Guanine?
a)
Adenine
b)
Cytosine
c)
Thymine
d)
Arganine 
30.

Which of the following models most accurately represents the structure of DNA?

a)
b)
c)
31.

Which of the following statements best explains the mechanism for DNA replication?

a)

DNA replication is reductive, because half the total DNA present is copied.

b)

DNA replication is semi-conservative, because each DNA strand serves as a template during replication.

c)

DNA replication is dispersive, because the two resulting DNA molecules are mixtures of parent and daughter DNA.

d)

DNA replication is conservative, because one resulting molecule is identical to the original and the other consists of two new strands.

32.
Which enzyme is responsible for adding nucleotides ("The Builder")?
a)

Helicase

b)
DNA Polymerase
c)
Ligase
d)
Primase
33.

What process is shown in this image?

a)

Transcription

b)

Translation

c)

DNA Replication

d)

Independent Assortment

34.

Why do cells replicate their DNA?

a)

To express genes

b)

To code for proteins

c)

To make more DNA for new cells

d)

To repair damaged DNA

35.
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
36.

What is Chargaff's rule

a)

DNA always has equal numbers of each of the bases

b)

DNA strands are equivalent

c)

DNA in any cell in any organism always has a 1:1 ratio

d)

The adenosine and thymine bases are always equal in quantity, as are guanine and cysteine.

37.
Where is DNA found in prokaryotic cells?
a)
in the cytoplasm
b)
in the nucleus
c)
in the nucleolus
d)
eukaryotic cells do not have DNA
38.
After examining the DNA of different organisms, which of the following did Chargaff conclude about the four bases?
a)
A = T and C = G
b)
A = C = G = T
c)
A = C and G =T
d)
A + T = C + G
39.

Which enzyme is responsible for adding nucleotides to a growing DNA strand during replication?

a)

DNA polymerase

b)

Ligase

c)

Helicase

d)

Primase

40.

If you look at a picture of a cell and find the DNA floating in the cytoplasm, what type of cell have you found?

a)

Prokaryote

b)

Eukaryote

c)

Not enough information

41.

Where does DNA replication occur in a EUKARYOTIC cell?

a)

cytoplasm

b)

ribosome

c)

nucleus

d)

cell membrane

42.

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

a)

Topoisomerase

b)

Telomerase

c)

DNA Helicase

d)

DNA Primase

43.

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

44.

What is the LAST enzyme used in DNA replication

a)

Topoisomerase

b)

Telomerase

c)

DNA Polymerase

d)

DNA Ligase

45.

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

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