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WorksheetsDNA
Total questions: 25
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? (This is the MONOMER 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.
Which 2 molecules form 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
10.
Which organelle is DNA usually found in?
a)
cell membrane
b)
vacuole
c)
chloroplast
d)
nucleus
11.
In the middle of the DNA strand, the bases (ATCG) are held together by what type of bond?
a)
polar bonds
b)
ionic bonds
c)
covalent bonds
d)
hydrogen bonds
12.
Any change in the sequence of DNA nucleotides or chromosomes is called a
a)
mutation
b)
single genotype
c)
monohybrid trait
d)
transgenic shift
13.
What is the MONOMER of DNA?
a)
Nucleotide
b)
Fatty Acids
c)
Amino Acids
d)
Monosaccharides
14.
Name this structure
a)
double helix
b)
nucelotide
c)
twisted ladder
d)
hydrogen bond
15.
Nitrogenous bases are joined by which type of bond?
a)
polar bonds
b)
ionic bonds
c)
covalent bonds
d)
hydrogen bonds
16.
Nucleotides are made up of a sugar, phosphate, and..?
a)
nitrogenous base
b)
nucleic acid
c)
cholesterol
d)
fatty acid
17.
Franklin used x-ray crystallography to determine the shape of the DNA molecule is
a)
a cloverleaf
b)
a braided rope
c)
a pleated sheet
d)
a twisted ladder
18.
How did Rosalind Franklin's photo 51 affect th work of Watson and Crick?
a)
It was used to determine the physical structure of DNA
b)
It was used to identify the four bases that make up DNA
c)
It was used to determine the theory of independent assortment
d)
It was used to show DNA was the molecule of inheritance
19.
Which series is arranged in order from largest to smallest in size?
a)
chromosome, nucleus, cell, DNA, nucleotide
b)
cell, nucleus, chromosome, DNA, nucleotide
c)
nucleotide, chromosome, cell, DNA, nucleus
d)
cell, nucleotide, nucleus, DNA, chromosome
20.
The process by which a DNA molecule is copied is called _____.
a)
binary fission
b)
mitosis
c)
replication
d)
translation
21.
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
22.
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
23.
Enzyme involved in DNA replication that joins individual nucleotides to produce a DNA molecule
a)
RNA polymerase
b)
helicase
c)
lactase
d)
DNA polymerase
24.
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
25.
Who made a 3-D model of DNA after studying other scientists work?
a)
Franklin
b)
Watson and Crick
c)
Chargaff
d)
Mendel
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