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WorksheetsParts of the DNA
Total questions: 27
Worksheet time: 24mins
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.
Which of the following units are repeatedly joined together to form a strand of DNA? (This is the MONOMER of DNA.)
a)
amino acids
b)
nucleotides
c)
fatty acids
d)
polysaccharides
3.
Adenine bonds with ______________.
a)
Guanine
b)
Thymine
c)
Cytosine
d)
Adenine
4.
Guanine bonds with ______________.
a)
Adenine
b)
Guanine
c)
Cytosine
d)
Thymine
5.
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
6.
Name this structure
a)
double helix
b)
nucelotide
c)
twisted ladder
d)
hydrogen bond
7.
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
8.
Which 2 molecules forms the sides (backbone) of the DNA ladder?
a)
deoxyribose and adenine
b)
deoxyribose and a hydrogen bond
c)
sugar and the nucleus
d)
deoxyribose (sugar) and phosphate
9.
Which organelle is DNA usually found in?
a)
cell membrane
b)
vacuole
c)
chloroplast
d)
nucleus
10.
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
11.
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
12.
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
13.
What is the correct complementary strand for the following DNA?ATCGAG
a)
TACGAG
b)
ATCGAG
c)
TAGCTG
d)
TAGCTC
14.
The DNA is found in the nucleus of what type of organisms?
a)
Bacteria
b)
Eukaryotes
c)
Prokaryotes
d)
Viruses
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.
DNA codes for...
a)
cholesterol
b)
proteins
c)
fatty acids
d)
carbohydrates
17.
DNA is a polymer made of monomers called
a)
Nucleotides
b)
Proteins
c)
Amino Acids
d)
Lipids
18.
a change in the nucelotide-base sequence of a gene or DNA molecule
a)
nucleotide
b)
DNA
c)
RNA
d)
mutation
19.
Has a deoxyribose sugar
a)
DNA
b)
RNA
20.
The sides of the double helix
a)
sugar phosphate
b)
nucleotides
c)
nitrogen bases
21.
What does DNA stand for?
a)
Deoxyribonucleic acid
b)
Denitrogenous acid
c)
Deribonucleic acid
d)
Diribonucleic acid
22.
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
23.
Nitrogenous bases are joined by which type of bond?
a)
polar bonds
b)
ionic bonds
c)
covalent bonds
d)
hydrogen bonds
24.
A five-carbon sugar found in DNA.
a)
ribose
b)
guanine
c)
deoxyribose
d)
helicase
25.
If one strand of DNA runs 5' to 3' the other strand runs
a)
5' to 3'
b)
3' to 5'
c)
5' to 5'
d)
3' to 3'
26.
What is the percentage of T?
a)
22%
b)
11%
c)
28%
d)
50%
27.
If a species has 33% A what is the percentage of C?
a)
33%
b)
17%
c)
34%
d)
67%
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