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Name ______________________________ Class___________________Date__________________
Assessment
Chapter Test B
Genes and DNA
USING KEY TERMS
Use the terms from the following list to complete the sentences below. Each term
may be used only once. Some terms may not be used.
nucleotides
mutations
ribosome
mutagens
genetic engineering
cytosine
thymine
insertion
1. DNA is composed of subunits known as ______________________.
2. Chargaff’s rules state that the amount of ______________________ in DNA
is always equal to the amount of guanine.
3. When scientists transfer genes from one organism to another, it is called
______________________.
4. When sequences of base pairs are copied incorrectly, they are called
______________________.
5. Examples of chemical ______________________ include asbestos and
chemicals found in cigarette smoke.
UNDERSTANDING KEY IDEAS
Write the letter of the correct answer in the space provided.
_____ 6. The code for a given amino acid consists of how many bases?
a. one
c. three
b. two
d. four
_____ 7. What materials make up each nucleotide in a DNA molecule?
a. mRNA, tRNA, and a ribosome
b. sugar, phosphate, and base
c. chromosomes and genes
d. amino acid, base, and protein
_____ 8. Some genetic disorders, such as sickle cell disease, are due to
a. a ribosome.
c. a DNA fingerprint.
b. a mutation.
d. genetic engineering.
_____ 9. The complementary strand to the DNA sequence TAGTCA is
a. ATGAGT.
c. GTAGAT.
b. GACAGT.
d. ATCAGT.
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__________________
Chapter Test B continued
_____ 10. What determines how tall you grow and whether your hair is curly or
straight?
a. a chromatid
b. RNA
c. proteins
d. ultraviolet radiation
_____ 11. Which item is genetic engineering NOT currently used for?
a. to genetically alter plants
b. to repair damaged genes
c. to manufacture proteins
d. to create natural gas
12. What are the three types of mutations?
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
13. Are all mutations harmful? Explain your answer.
____________________________________________________________________
____________________________________________________________________
14. Explain how Rosalind Franklin’s X-ray diffraction images helped Watson and
Crick make a model of DNA.
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
15. Describe how a DNA molecule makes a copy of itself.
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
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__________________
Chapter Test B continued
CRITICAL THINKING
16. Tell about a problem that our increasing genetic knowledge could solve in the
future. Give specifics.
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
17. Compare the process of DNA replication when a cell divides and the process
of making a protein. What is different about the two processes? What is the
same?
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
18. Describe a nucleotide. What are the parts that make up a nucleotide? What are
the differences in the four types of nucleotides? What larger things is a
nucleotide part of?
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
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__________________
Chapter Test B continued
CONCEPT MAPPING
19. Use the following terms to complete the concept map below:
genitic information
ribosomes
chromosomes
DNA
nucleotide bases
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
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Genes and DNA