WorksheetsDNA
Total questions: 28
Worksheet time: 33mins
Name
Class
Date
1.
Which of the following best describes a DNA molecule?
a)
double helix
b)
contains ribose
c)
made of amino acids
d)
contains Uracil
2.
Why is DNA important?
a)
it is very small and very complicated
b)
it's in everything
c)
it serves as the blueprint for traits of all living things
d)
because we eat it every day for energy
3.
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
4.
Nitrogenous bases are joined by which type of bond?
a)
polar bonds
b)
ionic bonds
c)
covalent bonds
d)
hydrogen bonds
5.
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
6.
Name this structure
a)
double helix
b)
nucelotide
c)
twisted ladder
d)
hydrogen bond
7.
Which organelle is DNA usually found in?
a)
cell membrane
b)
vacuole
c)
ribosome
d)
nucleus
8.
Nucleotides are made up of a sugar, phosphate, and..?
a)
nitrogenous base
b)
nucleic acid
c)
cholesterol
d)
fatty acid
9.
Which of the following is not a nitrogen base found in DNA?
a)
Thymine
b)
Uracil
c)
Guanine
d)
Adenine
10.
According to Chargaff's rule, Cytosine always pair with
a)
Adenine
b)
Uracil
c)
Thymine
d)
Guanine
11.
What is the significance of the sequence (order) of the Nitrogen Bases in DNA?
a)
The order of the Nitrogen Bases determines the number of chromosomes present in an organism.
b)
The order of the Nitrogen Bases determines the traits that an organism will possess (have).
c)
The order of the Nitrogen Bases determines the gender of an organism.
d)
The order of the Nitrogen Bases determines whether an organism is abiotic biotic.
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.
Which sequence of complementary 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
14.
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
15.
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
16.
Identify what structure is outlined in the BLACK outline.
a)
Base pair
b)
deoxyribose sugar
c)
phosphate group
d)
hydrogen bonds
e)
Nucleotide
17.
What group do these bases belong to?
a)
Purines
b)
Pyrimidines
18.
Which images represent pyrimidines? (two answers)
a)
b)
c)
d)
19.
Which series is arranged in order from largest to smallest in size?
a)
gene, chromosome, nucleus, cell, DNA, nucleotide
b)
cell, nucleus, chromosome, DNA, gene, nucleotide
c)
nucleotide, chromosome, cell, DNA, nucleus
d)
cell, DNA, gene, nucleotide, nucleus, chromosome
20.
Which of the following best describes a DNA molecule?
a)
double helix
b)
contains ribose
c)
made of amino acids
d)
contains Uracil
21.
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
22.
What does DNA stand for?
a)
Deoxyribonucleic acid
b)
Denitrogenous acid
c)
Deribonucleic acid
d)
Diribonucleic acid
23.
There are 52 Thymine bases and 38 Guanine bases in a molecule of DNA, how many desoxyribose sugars will be in the molecule?
a)
90
b)
104
c)
180
d)
76
24.
Assume that you have straight hair and your sibling has curly hair. What accounts for this difference?
a)
You have DNA and your sibling does not.
b)
The your sequence of nitrogen bases is different than your sibling.
c)
Your sibling has a weave.
d)
Your sibling has a genetic mutation.
25.
Adenine and Thymine are said to be ________________.
a)
matching
b)
opposite
c)
complementary
d)
corresponding
26.
Used x-ray diffraction to see the shape of DNA.
a)
Watson and Crick
b)
Franklin and Wilkins
c)
Chargaff and Sims
d)
Hershey and Chase
27.
If half of a DNA molecule reads T A C G A C A T C the other would be
a)
A T G G A T C C A
b)
A G T C G A T T A
c)
T A C G A C A T C
d)
A T G C T G T A G
28.
A and T are held together by _______ hydrogen bonds.
a)
1
b)
2
c)
3
d)
4
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