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Biology 101 > Ch.18 Viruses > Flashcards

Ch.18 Viruses Flashcards

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1
Q

________ is a viral illness that affects nearly 50 million Americans each year.
a. Influenza (“flu”)
b. Tuberculosis
c. Diphtheria
d. Osteoporosis

A

Influenza (“flu”)

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2
Q

______ named the agent responsible for tobacco mosaic disease as “tobacco mosaic virus,” thereby establishing the causative agent.
a. Adolf Meyer
b. Martinus Beijerinck
c. Wendell Stanley
d. David Baltimore

A

Adolf Meyer

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3
Q

All viruses have an outer protein coat known as the ________.
a. capsomere
b. envelope
c. capsid
d. capsule

A

capsid

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4
Q

Viruses that do not have an envelope are called ________ viruses.
a. uncoated
b. naked
c. unencapsulated
d. unenveloped

A

naked

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5
Q

Bacteriophages are viruses that infect ________.
a. bacteria
b. other viruses
c. plants
d. all of the above

A

bacteria

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6
Q

Viruses that are ________ undergo only the lytic cycle.
a. temperate
b. virulent
c. enveloped
d. latent

A

virulent

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7
Q

________ is the first phase of the bacteriophage life cycle.
a. Integration
b. Entry, or penetration,
c. Attachment
d. Synthesis and assembly

A

Attachment

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8
Q

Some viruses undergo a period of nonactivity in their life cycle and are said to be ________.
a. latent
b. virulent
c. infectious
d. harmless

A

Latent

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9
Q

Viroids cause disease in ________.
a. animals
b. plants
c. humans
d. all of the above

A

Plants

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10
Q

Diseases caused by prions affect the ________ system.
a. nervous
b. cardiovascular
c. urinary
d. digestive

A

Nervous

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11
Q

Because ________ do NOT have nucleic acids, they are difficult to eradicate.
a. viroids
b. prions
c. viruses
d. bacteria

A

prions

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12
Q

Influenza, the common cold, smallpox, and herpes are all illnesses that ________.
a. infect humans
b. are caused by viruses
c. are highly contagious
d. all of the above

A

All of the above

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13
Q

Which of the following diseases is caused by a naked virus?
a. Herpes.
b. Polio.
c. Influenza.
d. Rabies.

A

Polio

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14
Q

Which of the following diseases is caused by an enveloped virus?
a. AIDS.
b. Herpes.
c. Smallpox.
d. All of the above.

A

All of the above

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15
Q

Which of the following phases of the bacteriophage life cycle involves insertion of the viral genome into the host cell?
a. Adsorption, or attachment.
b. Entry, or penetration.
c. Integration.
d. Synthesis and assembly.

A

Entry, or penetration

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16
Q

What typically happens in the life cycle of the virus that causes cold sores?
a. The virus has a period of nonactivity.
b. The virus is activated during entry.
c. Virus particles are released slowly.
d. All of the above.

A

All of the above

17
Q

Which of the following is NOT a prion disease?
a. Kuru in humans.
b. Scrapie in sheep and goats.
c. Hepatitis A.
d. Creutzfeldt-Jakob disease.

A

Hepatitis A.

18
Q

Viroids are transmitted by which of the following means?
a. In pollen grains.
b. In seeds via sucking insects.
c. Via pruning.
d. All of the above.

A

All of the above

19
Q

Which of the following viral diseases is transmitted by sharing body fluids?
a. Influenza.
b. Tuberculosis.
c. Genital herpes.
d. Common cold.

A

Genetial herpes

20
Q

Which of the following is a characteristic of viruses?
a. They are structurally very complex.
b. Most have a limited host range.
c. They are larger than bacteria.
d. Only a few of them cause disease.

A

Most have a limited host range

21
Q

Which of the following statements regarding viruses are true?
a. The status of viruses, living or non-living, has been debated for years.
b. Our ancestors thought diseases were caused by poison and evil spirits.
c. “Tobacco mosaic virus” infects many plants in addition to tobacco plants.
d. All of the above.

A

All of the above

22
Q

Ancient Chinese medicine practices included:
a. molds to prevent and treat disease.
b. pus-soaked rags placed in the nose to develop immunity.
c. use of gold-salts for rheumatic conditions.
d. A, B, and C.
e. A and B.

A

e. A and B

23
Q

Which of the following is a double-stranded RNA virus?
a. Parvovirus.
b. Cystovirus.
c. Orthomyxovirus.
d. Poxvirus.

A

Cystovirus

24
Q

Which of the following is a characteristic of temperate viruses?
a. Integrate their genetic material into the host cell genome.
b. Undergo both the lysogenic and the lytic cycle.
c. Eventually destroy the host cell.
d. All of the above.

A

All of the above

25
Q

Which of the following is true of coronavirus?
a. It is a double-stranded DNA virus.
b. It causes severe acute respiratory syndrome (SARS).
c. It is a naked virus.
d. It causes monkeypox.

A

It causes severe acute respiratory syndrome (SARS).

26
Q

Which of the following is a double-stranded DNA virus that causes viral pneumonia?
a. Togavirus.
b. Reovirus.
c. Adenovirus.
d. Poxvirus.

A

Adenovirus.

27
Q

Which of the following does NOT occur in the lytic cycle?
a. Insertion of the viral genome into the host cell.
b. Integration of the viral genome into the genetic material of the host cell.
c. Lysis of the host cell.
d. Synthesis of the viral capsid.

A

Integration of the viral genome into the genetic material of the host cell

28
Q

Which of the following occurs during the assembly phase of the bacteriophage life cycle?
a. Replication of the viral genome.
b. Synthesis of the viral capsid.
c. Maturation of the viral particles.
d. All of the above.

A

All of the above

29
Q

Herpes viruses cause which of the following diseases?
a. Mononucleosis.
b. Cold sores.
c. Genital herpes.
d. All of the above.

A

All of the above

30
Q

A period of nonactivity in a typical virus life cycle is known as a/an ______.
a. lytic period
b. virulent period
c. integrative period
d. latent period

A

Latent period

Biology 101 (18 decks)

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