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Worksheets1.5 DNA & RNA molecules DB014
Total questions: 26
Worksheet time: 32mins
Name
Class
Date
1.
In a strand of DNA, if it contains 20% of Thymine, then how much Guanine would be present?
a)
30%
b)
20%
c)
80%
d)
10%
2.
Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG
ATG TGA CAG
a)
ATG TGA CAG
b)
TAC ACT GTC
c)
GTA AGT GAC
d)
CAT TCA CTG
3.
Which of the following best describes a DNA molecule?
a)
double helix
b)
contains ribose
c)
made of amino acids
d)
contains Uracil
4.
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
5.
Guanine bonds with ______________.
a)
Adenine
b)
Guanine
c)
Cytosine
d)
Thymine
6.
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
7.
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
8.
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
9.
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
10.
Nitrogenous bases are joined by which type of bond?
a)
polar bonds
b)
ionic bonds
c)
covalent bonds
d)
hydrogen bonds
11.
The following picture must be
a)
DNA because it's double stranded
b)
RNA because it's single stranded
c)
DNA because it's single stranded
d)
RNA because it's double stranded
12.
Which two scientists are accredited with correctly deducing the double helix model of DNA?
a)
Watson and Crick
b)
Wilkins and Franklin
c)
Wilkins and Crick
d)
Watson and Franklin
13.
What does this picture represent?
a)
amino acid
b)
base pairing
c)
nucleotide
d)
the DNA molecule
14.
Adenine bonds with ______________.
a)
Guanine
b)
Thymine
c)
Cytosine
d)
Adenine
15.
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
16.
The correct spelling of DNA is....
a)
deoxiribonucleic acid
b)
deoxyribosenucleic acid
c)
deoxyribonucleic acid
d)
deoxyribonucliec acid
17.
RNA contains the sugar
a)
ribose
b)
deoxyribose
c)
glucose
d)
lactose
18.
Which of the following statements is true?
a)
DNA is single-stranded
b)
RNA is single-stranded
c)
DNA contains uracil
d)
RNA contains deoxyribose
19.
What is the difference between DNA and RNA in terms of bases?
a)
RNA contains uracil in place of thymine
b)
RNA contains uracil in place of adenine
c)
RNA contains uracil in place of guanine
d)
RNA contains uracil in place of cytosine
20.
I include the bases Guanine, Cytosine, Adenine and Thymine.
a)
DNA
b)
RNA
21.
I include the bases Guanine, Cytosine, Adenine and Uracil .
a)
DNA
b)
RNA
22.
I have the sugar ribose.
a)
DNA
b)
RNA
23.
How is the DNA sequence AATTA replicated in a new strand during semi conservative replication?
a)
AATTA
b)
AATAA
c)
TTATT
d)
TTAAT
24.
All organisms contain DNA and RNA. What are the subunits of DNA and RNA?
a)
simple sugars
b)
amino acids
c)
carbohydrates
d)
nucleotides
25.
Dr. Tanaka discovered a new virus. The virus has a single strand of a nucleic acid, but she does not know if it is DNA or RNA. After running tests, she concludes that it is DNA. Which of the following would lead her to that conclusion?
a)
It contains uracil.
b)
It contains adenine.
c)
It contains thymine.
d)
It contains cytosine.
26.
RNA differs from DNA in that RNA
a)
is single stranded
b)
contains a different sugar molecule
c)
contains the nitrogen base uracil
d)
all of the above
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