McGraw-Hill OnlineMcGraw-Hill Higher EducationLearning Center
Student Center | Instructor Center | Information Center | Home
Biocourse.com
NetTutor
Web Links
Information on Anthrax
Microbiology in the News
Careers in Microbiology
Study Tips
Correlation Guide to MiM III
Glossary A-F
Glossary G-L
Glossary M-R
Glossary S-Z
Clinical Case Studies
Interactive Time Line
Lab Sequence Data
Chapter Overview
Chapter Objectives
Study Outline
Chapter Web Links
Web Exercises
Flash Cards
Self-Quiz
True or False
Feedback
Help Center


Microbiology, Fifth Edition
Microbiology, 5/e
Lansing M Prescott, Augustana College
Donald A Klein, Colorado State University
John P Harley, Eastern Kentucky University

The Viruses: Introduction and General Characteristics

Multiple Choice Quiz

Choose the best answer



1

The conquest of the Aztec Empire in Mexico was made possible by a ______ epidemic that ravaged Mexico City.
A)Measles
B)Smallpox
C)Rabies
D)Influenza
E)Chickenpox
2

Edward Jenner began inoculating humans with material from _______ lesions.
A)Smallpox
B)Avianpox
C)Cowpox
D)Chickenpox
E)Dogpox
3

Viruses require ______ for growth.
A)Plants
B)Animals
C)Bacteria
D)Living cells
E)Fungi
4

Holes produced in bacterial “lawns” by viruses are called
A)Colonies
B)Plaques
C)Patches
D)Lysis
E)Clearance
5

Which is NOT true of virions?
A)Contain DNA
B)Contain RNA
C)Are extracellular
D)Reproduce independently
E)Induce host metabolism
6

Which of the following are obligate intracellular parasites?
A)Viruses
B)Chlamydia
C)Rickettsia
D)All of the above
E)None of the above
7

Plant viruses may be cultivated in
A)Tissue culture
B)Cultures of separated cells
C)Cultures of protoplants
D)Whole plants
E)All of the above
8

Viruses can be purified based on their size and density by use of
A)Gradient centrifugation
B)Differential centrifugation
C)Precipitation
D)Filtration
E)All of the above
9

Which of the following may affect proteins and nucleic acids, but NOT viruses?
A)Denaturation
B)Enzyme treatment
C)Heat
D)Drastic pH changes
E)All of the above
10

The most popular indirect method of counting virus particles is
A)Microscopically
B)By hemagglutination assay
C)By plaque-assay
D)By counting plaque-forming units
E)By colony counting
11

What kind of embryo is often used for viral assays?
A)Mouse
B)Rat
C)Cat
D)Dog
E)Chicken
12

Enveloped viruses have a ______ shape.
A)Icosahedral
B)Helical
C)Hexagonal
D)Roughly spherical
E)Complex
13

The most efficient way to enclose a space is within a/an
A)Sphere
B)Cube
C)Icosahedron
D)Helix
E)None of the above
14

Usually viruses are separated into several large groups based primarily on
A)Nature of the host
B)Nucleic acid characteristics
C)Capsid symmetry
D)Presence of an envelope and ether sensitivity
E)Diameter of the viroin or nucleocapsid