WorksheetsDNA
Total questions: 30
Worksheet time: 30mins
Name
Class
Date
1.
Which sequence of DNA bases would pair with this partiaal strand
ATG TGA CAG
ATG TGA CAG
a)
ATG TGA CAG
b)
TAC ACT GTC
c)
GTA AGT GAC
d)
CAT TCA CTG
2.
Which of the following best describes a DNA molecule?
a)
double helix
b)
contains ribose
c)
made of amino acids
d)
contains Uracil
3.
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
4.
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
5.
Adenine bonds with ______________.
a)
Guanine
b)
Thymine
c)
Cytosine
d)
Adenine
6.
Guanine bonds with ______________.
a)
Adenine
b)
Guanine
c)
Cytosine
d)
Thymine
7.
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
8.
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
9.
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
10.
Which 2 molecules form the sides (backbone) of the DNA ladder?
a)
deoxyribose and adenine
b)
deoxyribose and a hydrogen bond
c)
deoxyribose and the nucleus
d)
deoxyribose and phosphate
11.
Which organelle is DNA usually found in?
a)
cell membrane
b)
vacuole
c)
chloroplast
d)
nucleus
12.
Name this structure
a)
double helix
b)
nucelotide
c)
twisted ladder
d)
hydrogen bond
13.
Nitrogenous bases are joined by which type of bond?
a)
polar bonds
b)
ionic bonds
c)
covalent bonds
d)
hydrogen bonds
14.
Nucleotides are made up of a sugar, phosphate, and..?
a)
nitrogenous base
b)
nucleic acid
c)
cholesterol
d)
fatty acid
15.
The backbone of a DNA molecule is made of which two components?
a)
phosphate molecules and ribose sugars
b)
deoxyphosphate molecules and ribose sugars
c)
phosphate molecules and deoxyribose sugars
d)
deoxyphosphate molecules and deoxyribose sugars
16.
Watson and Crick were the first to suggest that DNA is _____
a)
a short molecule
b)
the shape of a double helix
c)
a protein molecule
d)
the genetic material
17.
The process by which a DNA molecule is copied is called _____.
a)
binary fission
b)
mitosis
c)
replication
d)
translation
18.
Enzyme involved in DNA replication that joins individual nucleotides to produce a DNA molecule
a)
RNA polymerase
b)
helicase
c)
lactase
d)
DNA polymerase
19.
a Y-shaped point that results when the two strands of a DNA double helix separate so that the DNA molecule can be replicated
a)
helicase
b)
replication fork
c)
cytosine
d)
nucleotide
20.
A five-carbon sugar found in DNA.
a)
ribose
b)
guanine
c)
deoxyribose
d)
helicase
21.
A human cell is an example of a ____ cell
a)
eukaryotic
b)
prokaryotic
22.
The DNA of a eukaryotic cell is in the
a)
cytoplasm
b)
nucleus
c)
lysosome
d)
ribosome
23.
The DNA of a prokaryotic cell is in the
a)
cytoplasm
b)
nucleus
c)
lysosome
d)
ribosome
24.
Who used X ray diffraction to better understand DNA?
a)
Franklin
b)
Watson and Crick
c)
Chargaff
d)
Mendel
25.
Who realized that A is always equal to T and C is always equal to G?
a)
Franklin
b)
Watson and Crick
c)
Chargaff
d)
Mendel
26.
Who made a 3-D model of DNA after studying other scientists work?
a)
Franklin
b)
Watson and Crick
c)
Chargaff
d)
Mendel
27.
What is the correct complementary strand for the following DNA?ATCGAG
a)
TACGAG
b)
ATCGAG
c)
TAGCTG
d)
TAGCTC
28.
Which of the following is not a nitrogen base in DNA?
a)
Adenine
b)
Cytosine
c)
Uracil
d)
Thymine
29.
One side of a strand of DNA reads "AATCGA." What is the complementary strand?
a)
AATCGA
b)
TTAGCT
c)
CCGATC
d)
GGCTAG
30.
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
100 %
