Virus taks questions

Дата канвертавання27.04.2016
Памер18.21 Kb.
Spring 2003 – 11
(6) Most viruses infect a specific kind of cell. Which of the following are infected by the human immunodeficiency virus (HIV)?
F* Helper T cells

G Liver cells

H GABA-receptor cells

J Red blood cells
April 2004 – 10

(11) The diagram above represents a virus with its surface markers. The diagrams below show various animal cells with receptor sites. Which of the following cells is most likely affected by this virus? Answer: D

April 2004 – 10
(53) What is the most common threat to a host organism posed by an invading virus?
A Production of viral fluids in the bloodstream

B Fermentation of acids in the digestive system

C* Destruction of cells by viral reproduction

D Stimulation of muscle tone in the heart
April 2004 – 11

(44) Viruses differ from bacteria in that all viruses —
F cause insect-borne diseases

G can be destroyed by antibiotics

H have rigid cell walls

J* must be reproduced in living cells
July 2004 – 11

42 One characteristic shared by a virus and a living cell is that both —

F* store genetic information in nucleic acids

G have a crystalline structure

H gain energy directly from the sun

J use glucose for respiration
October 2005 – 11

9 Which of the following explains why antibiotics can treat flu-like symptoms caused by bacteria but are ineffective against flu?

A Flu is a response to an antigen.

B Antibiotics require time to work.

C Antibiotics strengthen antibodies.

D* Flu is caused by a virus.
Fall 2005 – 11

35 Enzymes allow viruses to insert their genetic material into the host cell’s DNA. The virus benefits from this action by —

A acquiring the traits of the host cell

B* causing the host cell to produce viruses

C introducing random deadly mutations into the host cell

D turning the host cell into a virus

February 2006 – 11

10 Which of these events is most likely to cause a widespread influenza outbreak?

F People in northern regions are affected by weather patterns.

G The influenza virus is recognized by host immune systems.

H Global warming causes increased winter precipitation.

J* People lack immunity to a new strain of flu virus.
April 2006 – 10

17 Which of the following is found in both cells and viruses?

A Silica

B* Genetic material

C Digestive cavity

D Flagella
April 2006 – 10

21 People infected with the human immunodeficiency virus (HIV) have an increased risk of dying from secondary infections. Which of these best explains how HIV increases the danger of secondary infections?

A HIV produces antigens that damage red blood cells.

B HIV adds genetic material from harmful microbes.

C* HIV destroys helper T cells.

D HIV consumes beneficial microbes in the body.
April 2006 – 10

36 Viruses can be transmitted in a variety of ways. The virus that causes SARS (severe acute respiratory syndrome) can be transmitted when an infected person coughs or sneezes. This virus is transmitted in a manner most similar to the transmission of —

F smallpox


H West Nile virus

J* influenza

April 2006 – 11

14 Which of the following cannot metabolize nutrients? Answer G

April 2006 – 11

47 Which of these does a virus need in order to multiply?

A Chloroplasts from a host cell

B A host cell to provide oxygen for the virus

C New ADP from a host cell

D* A host cell to replicate the virus’s DNA

July 2006

47 Why is Sendai virus used as a vaccine against HPIV-1?

A It alters the protein coat of HPIV-1.

B It makes cells chemically unrecognizable to HPIV-1.

C It forms a protective barrier against HPIV-1.

D* It triggers the production of antibodies that fight HPIV-1.

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