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DNA

Total questions: 63

Worksheet time: 45mins

Name
Class
Date
1.
What are the nucleotides made of?
a)
Sugar, Phosphate, nitrogen base
b)
Phosphate, Adenine, nitrogen base
c)
Thymine, Adenine, Cytomine
d)
Phosphate, Nitrogen, Adenine
2.
Adenine bonds with ______________.
a)
Guanine
b)
Thymine
c)
Cytosine
d)
Adenine
3.
Guanine bonds with ______________.
a)
Adenine
b)
Guanine
c)
Cytosine
d)
Thymine
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.
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
6.

In eukaryotes, which organelle is DNA usually found in?

a)

cell membrane

b)

vacuole

c)

chloroplast

d)

nucleus

7.
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
8.
What does DNA stand for?
a)
Deoxyribonucleic acid
b)
Denitrogenous acid
c)
Deribonucleic acid
d)
Diribonucleic acid
9.
The sugar in DNA is ?
a)
sucrose
b)
glucose
c)
deoxyribose
d)
fructose
10.
The building block of nucleic acids are nucleotides.  Nucleotides are composed of a sugar, a phosphate group, and a _________________ base.
a)
oxygen
b)
hydrogen
c)
nitrogen
d)
carbon
11.
Which of the following monomers are repeatedly joined together to form a strand of DNA?
a)
amino acids
b)
nucleotides
c)
fatty acids
d)
polysaccharides
12.
What determines the code, or information, of a DNA molecule?
a)
the shape (structure) of the nitrogen bases
b)
the order (sequence) of the nitrogen bases
c)
the color of the nitrogen bases
d)
the frequency (number) of nitrogen bases
13.
Which 2 molecules form the sides (backbone) of the DNA ladder?
a)
deoxyribose sugar and adenine
b)
deoxyribose sugar and a hydrogen bond
c)
deoxyribose sugar and the nucleus
d)
deoxyribose sugar and phosphate
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.
The drawing shows the structure of what molecule?
a)
A DNA molecule
b)
A lipid molecule
c)
A carbohydrate molecule
d)
A protein molecule
16.
X outlines a(n) ___________.
a)
amino acid
b)
nitrogen base 
c)
nucleotide
d)
nitrogen base pair
17.
A long chain of amino acids is a/an
a)
protein
b)
nucleic acid
c)
tRNA
d)
mRNA
18.
If a DNA molecule consists of 29% Guanine, how much cytosine will it contain?
a)
29%
b)
58%
c)
21%
d)
I have no idea.
19.
DNA codes for...
a)
bases
b)
proteins
c)
amino acids
d)
phosphates
20.

A change in a DNA sequence(order) that affects genetic information.

a)

Recessive trait

b)

Mutation

c)

Allele

21.
the process of making a copy of DNA
a)
transcription
b)
double helix
c)
DNA replication
d)
replication fork
22.

What shape is DNA?

a)

a circle

b)

a triangle

c)

a double helix

23.
The enzyme that unwinds the DNA to prepare for replication
a)
helicase
b)
replicase
c)
polymerase
d)
synthase
24.
A process in which DNA has the unique ability to make an exact copy of itself.
a)
Replication
b)
Translation
c)
Transcription
25.
Why does DNA replicate?
a)
To create another copy for the new cell
b)
To create a duplicate copy in case the original gets damaged
c)
To create a new copy to replace the damaged original
26.

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

27.

Enzyme that connects the DNA to the backbone (glues)

a)

Ligase

b)

Polymerase

c)

Helicase

d)

Primase

28.

Enzyme that breaks hydrogen bonds (unzips)

a)

Ligase

b)

Polymerase

c)

Primase

d)

Helicase

29.

Site where replication begins

a)

Polymerase action site

b)

Replication fork

c)

Replication Origin

d)

In the front

30.

#1 in the picture above (builder)

a)

Helicase

b)

Primase

c)

Polymerase

d)

Ligase

31.

#4 in the picture

a)

Polymerase

b)

Primase

c)

Helicase

d)

Ligase

32.
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
33.
What is the shape of DNA?
a)
Double helix
b)
Triple helix
c)
Flat, bilayer
d)
Three-pronged rigid ladder
34.

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

35.

Which is the second step?

a)

DNA Helicase unwinds original DNA strand

b)

RNA Primase lays down RNA primer for new nucleotide bases.

c)

DNA polymerase builds new strands by bring in new nucleotide bases.

d)

Ligase knits together fragments on lagging strand

36.

Which is the first step?

a)

DNA Helicase unwinds original DNA strand

b)

RNA Primase lays down RNA primer for new nucleotide bases.

c)

DNA polymerase builds new strands by bring in new nucleotide bases.

d)

Ligase knits together fragments on lagging strand

37.

Which is the third step?

a)

DNA Helicase unwinds original DNA strand

b)

RNA Primase lays down RNA primer for new nucleotide bases.

c)

DNA polymerase builds new strands by bring in new nucleotide bases.

d)

Ligase knits together fragments on lagging strand

38.

Which is the fourth step?

a)

DNA Helicase unwinds original DNA strand

b)

RNA Primase lays down RNA primer for new nucleotide bases.

c)

DNA polymerase builds new strands by bring in new nucleotide bases.

d)

Ligase knits together fragments on lagging strand

39.

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

a)

A

b)

C

c)

B

d)

None of the above

40.

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

41.

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

a)

lagging

b)

leading

42.
In RNA, Uracil pairs with ______. 
a)
cytosine
b)
adenine
c)
guanine
d)
thymine
43.
The mRNA leaves the ________ to find the ribosome to make proteins.
a)
cell
b)
nucleotide
c)
nucleus
44.

DNA holds the code for making

a)

lipids

b)

carbohydrates

c)

proteins

d)

sugars

45.

Choose the sequence of the mRNA strand that would be match up with to the following strand:

GTAGTCA

a)

UATUAGA

b)

ACGACTG

c)

CAUCAGU

d)

CATCAGT

46.
The main function of tRNA is to...
a)
carry a message that, when translated, forms proteins
b)
form a portion of ribosomes
c)
string together complementary RNA and DNA strands
d)
bring amino acids from the cytoplasm to the ribosomes
47.
What amino acid is represented by the codon UUA?
a)
Phenylalanine
b)
Tyrosine
c)
Leucine
d)
Stop codon
48.

What is the correct amino acid sequence for the mRNA code AUGCCAGUAUGA

a)

Met-Pro-Ala-Val

b)

Met-Pro-Val

c)

Tyr-Gly-His

d)

Tyr-Gly-Arg-His

49.

Which is the mRNA molecule that would be created from this DNA template:

TGGCAAGTACGT

a)

ACCGTTCATGCA

b)

UGGCAAGUACGU

c)

UCCGUUCUUGCU

d)

ACCGUUCAUGCA

50.
Contains the bases adenine, uracil, cytosine and guanine
a)
DNA
b)
RNA
c)
Both
51.
What part of protein synthesis does this diagram represent?
a)
mRNA
b)
tRNA
c)
rRNA
d)
RNA
52.
DNA travels outside of the nucleus.
a)
true
b)
false
53.
Messenger RNA carries a copy of the DNA code.
a)
true
b)
false
54.
Where do cells get the information to make proteins?
a)
RNA
b)
DNA
c)
phosphate group
55.
The process to go from DNA to mRNA is _______
a)
translation
b)
transcription
c)
replication
56.
The process to go from mRNA to a protein is called ____
a)
transcription
b)
rRNA
c)
replication
d)
translation
57.
A sugar, a phosphate group, and a nitrogen base form the building blocks of which organic compound?
a)
carbohydrates
b)
nucleic acids
c)
lipids
d)
proteins
58.
which process is shown?
a)
diffusion
b)
repiration
c)
recombination
d)
translation
59.
When an extra base is inserted into the DNA sequence of a gene, the protein doesn't work. Which explains why?
a)
the base increases rate of translation
b)
the base causes DNA to be transcribed in opposite direction
c)
the inserted base causes the codons in the sequence to be incorrect for the desired protein
d)
the base signals enzymes to translate DNA rather than RNA
60.
Which of the following best describes how DNA and RNA are similar?
a)
they both contain A and T
b)
They both have a double helix
c)
They are both composed of 5 different nucleotides
d)
they both have C and G
61.
Which of the following best describes how DNA and RNA are similar?
a)
they both contain A and T
b)
They both have a double helix
c)
They are both composed of 5 different nucleotides
d)
they both have C and G
62.
The DNA sequence ATCAGCGCTGGC is part of a gene. how many amino acids are coded for by this message?
a)
4
b)
8
c)
12
d)
20
63.
Genetic info flows in one direction. Which best represents this flow?
a)
DNA-protein-RNA
b)
Protein-RNA-DNA
c)
RNA-protein-DNA
d)
DNA-RNA-protein

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