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Name ______________________________ Class ___________________ Date __________________
HO#______
Genes and DNA Chapter 4 Review
Write the letter of the correct answer in the space provided.
_____ 1. DNA is made of subunits called what?
a. proteins
b. deoxyribonucleic acids
c. traits
d. nucleotides
_____ 2. Nucleotides are made of a sugar, a phosphate, and a
a. base.
b. protein.
c. gene.
d. ribosome.
_____ 3. Who discovered that the amount of adenine in DNA always equals the
amount of thymine?
a. Rosalind Franklin
b. James Watson
c. Erwin Chargaff
d. Francis Crick
_____ 4. What scientist made images of DNA by using X-ray diffraction?
a. Rosalind Franklin
b. James Watson
c. Erwin Chargaff
d. Francis Crick
_____ 5. What did Watson and Crick’s model of DNA look like?
a. a ball
b. a straight line
c. links in a chain
d. a long, twisted ladder
_____ 6. A string of nucleotides that has information for making one trait is
a. a protein.
b. a gene.
c. an amino acid.
d. a cell.
_____ 7. Each set of three bases is a code for
a specific cell.
b. a specific chromosome.
c. a specific ribosome.
d. a specific amino acid.
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
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Genes and DNA
Name ______________________________ Class ___________________ Date __________________
_____ 8. The first step in making a protein is
a. RNA copying DNA.
b. transfer RNA matching mRNA.
c. mRNA going to ribosome.
d. amino acids linked together.
_____ 9. What is the type of mutation where a base is added to the gene?
a. deletion
b. substitution
c. insertion
d. ultraviolet
_____ 10. Using DNA to identify who committed a crime is
a. genetic engineering.
b. DNA fingerprinting.
c. genetic disease.
d. DNA cloning.
Match the correct definition with the correct term. Write the letter in the space
provided.
_____ 11. the form of mutation where one base is
replaced by another kind
_____ 12. a subunit of DNA that consists of a sugar, a
phosphate, and a base
_____ 13. the organelle where proteins are
synthesized by messenger RNA and
transfer RNA
_____ 14. material shaped like a double helix that
determines inherited characteristics
_____ 15. a molecule that makes a mirror copy of
sections of DNA and helps make protein
_____ 16. a string of nucleotides that give the cell
information about how to make a specific
trait
a. gene
b. RNA
c. nucleotide
d. ribosome
e. DNA
f. mutation
g. substitution
h. proteins
i. insertion
j. deletion
_____ 17. a change in DNA caused by random error
or a mutagen
_____ 18. the material made of amino acids that
causes most of the differences we see in
organisms
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
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Genes and DNA
Name ______________________________ Class ___________________ Date __________________
MATCHING
Match the correct definition with the correct term. Write the letter in the space
provided.
_____ 19. the stage at which a DNA molecule is split
down the middle
_____ 20. the base complementary to adenine
_____ 21. the base complementary to cytosine
_____ 22. a physical or chemical agent that can cause a
mutation
_____ 23. substances that scientists can produce
through genetic engineering
a. guanine
b. chromosomes
c. replication
d. amino acids
e. mutagen
f. thymine
g. proteins
_____ 24. in a cell nucleus, the structures that strands
of DNA are bundled into
_____ 25. chemical parts that are transferred to the
ribosome by transfer RNA and matched to
messenger RNA
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Science and Technology
38
Genes and DNA