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# In response to viral infection, the immune systems of mice

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In response to viral infection, the immune systems of mice [#permalink]

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16 May 2005, 10:10
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Official Guide for GMAT Verbal Review, 2nd Edition

Practice Question
Question No.: 62
Page: 141
Difficulty:

In response to viral infection, the immune systems of mice typically produce antibodies that destroy the virus by binding to proteins on its surface. Mice infected with a herpesvirus generally develop keratitis, a degenerative disease affecting part of the eye. Since proteins on the surface of cells in this part of the eye closely resemble those on the herpesvirus surface, scientists hypothesize that these cases of keratitis are caused by antibodies to herpesvirus.

Which of the following, if true, gives the greatest additional support to the scientist's hypothesis?

A. Other types of virus have surface proteins that closely resemble proteins found in various organs of mice.
B. There are mice that are unable to form antibodies in response to herpes infections, and these mice contract herpes at roughly the same rate as other mice.
C. Mice that are infected with a herpesvirus but do not develop keratitis produce as many antibodies as infected mice that do develop keratitis.
D. There are mice that are unable to form antibodies in response to herpes infections, and these mice survive these infections without ever developing keratitis.
E. Mice that have never been infected with a herpesvirus can sometimes develop keratitis.
[Reveal] Spoiler: OA

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16 May 2005, 10:21
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I pick D. D says if the mice forms antibodies, it will have keratitis.

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16 May 2005, 10:25
D

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16 May 2005, 11:52
D.

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17 May 2005, 00:27
I too go with D as that is the only option that mentions that without antibodies keratitis is not formed.

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17 May 2005, 00:43
One more for D

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17 May 2005, 00:54
D it is

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17 May 2005, 02:15
(D). Pretty tough one to relate all the elements.

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In response to viral infection, the immune systems of mice [#permalink]

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06 Nov 2005, 12:54
In response to viral infection, the immune systems of mice typically produce antibodies that destroy the virus by binding to proteins on its surface. Mice infected with a herpesvirus generally develop keratitis, a degenerative disease affecting part of the eye. Since proteins on the surface of cells in this part of the eye closely resemble those on the herpesvirus surface, scientists hypothesize that these cases of keratitis are caused by antibodies to herpesvirus.

Which of the following, if true, gives the greatest additional support to the scientist's hypothesis?

A. Other types of virus have surface proteins that closely resemble proteins found in various organs of mice.
B. There are mice that are unable to form antibodies in response to herpes infections, and these mice contract herpes at roughly the same rate as other mice.
C. Mice that are infected with a herpesvirus but do not develop keratitis produce as many antibodies as infected mice that do develop keratitis.
D. There are mice that are unable to form antibodies in response to herpes infections, and these mice survive these infections without ever developing keratitis.
E. Mice that have never been infected with a herpesvirus can sometimes develop keratitis.
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06 Nov 2005, 22:55
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Antibodies kill both VIRUS and EYE.

No antibodies, no eye damage.

D. There are mice that are unable to form antibodies in response to herpes infections, and these mice survive these infections without ever developing keratitis.
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07 Nov 2005, 00:14
I think D is correct.

What is the OA?

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07 Nov 2005, 01:02
One more vote for D

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07 Nov 2005, 05:47
yup D is the OA.

I was really stuck between D and E.
how did you guyd eliminate E.
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In response to viral infection, the immune systems of mice [#permalink]

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24 Nov 2005, 01:58
In response to viral infection, the immune systems of mice typically produce antibodies that destroy the virus by binding to proteins on its surface. Mice infected with a herpesvirus generally develop keratitis, a degenerative disease affecting part of the eye. Since proteins on the surface of cells in this part of the eye closely resemble those on the herpesvirus surface, scientists hypothesize that these cases of keratitis are caused by antibodies to herpesvirus.

Which of the following, if true, gives the greatest additional support to the scientistsâ€™ hypothesis?

A. Other types of virus have surface proteins that closely resemble proteins found in various organs of mice.
B. There are mice that are unable to form antibodies in response to herpes infections, and these mice contract herpes at roughly the same rate as other mice.
C. Mice that are infected with a herpesvirus but do not develop keratitis produce as many antibodies as infected mice that do develop keratitis.
D. There are mice that are unable to form antibodies in response to herpes infections, and these mice survive these infections without ever developing keratitis.
E. Mice that have never been infected with a herpesvirus can sometimes develop keratitis.
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24 Nov 2005, 02:26
think that B) is correct .

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24 Nov 2005, 02:56
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It should be D

conlclusion: these cases of keratitis are caused by antibodies to herpesvirus.

Premise1: Mice infected with a herpesvirus generally develop keratitis

Premise2: the immune systems of mice typically produce antibodies that destroy the virus by binding to proteins on its surface.

Premise3:proteins on the surface of cells in this part of the eye closely resemble those on the herpesvirus surface.

we need an evidence to strengthen the conclusion.
the evidence need to show that if a mouse cannot produce antibodies in respose to herpesvirus but did not develop keratitis, the conclusion will be further strengthen.

so D is the right choice.
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24 Nov 2005, 06:24
Yeah, should be (D).
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24 Nov 2005, 09:34
D as well.

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24 Nov 2005, 23:09
It should be D.

A - How does that matter.
B - Out of Scope.
C - Weakens the arg.
D - Correct.
E - How does that matter.

Hence D.

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In response to viral infection, the immune systems of mice [#permalink]

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20 Jun 2006, 09:39
In response to viral infection, the immune systems of mice typically produce antibodies that destroy the virus by binding to proteings on its surface. Mice infected with a herpesvirus generally develop keratitis, a degenerative disease affecting part of the eye. Since proteins on the surface of cells in this part of the eye closely resemble those on the herpervirus surface, scientists hypothesize that these cases of keratitis are caused by antibodies to herpesvirus.
Which of the following, if true, gives the greatest additional support to the scientists' hypothesis?

A. Other types of virus have surface proteins that closely resemble proteins found in various organs of mice.
B. There are mice that are unable to form antibodies in response to herpes infections, and these mice contract herpes at roughly the same rate as other mice.
C. Mice that are infected with a herpesvirus but do not develop keratitis produce as many antibodies as infected mice that do develop keratitis.
D. There are mice that are unable to form antibodies in response to herpes infections, and these mice survive these infections without ever developing keratitis.
E. Mice that have never been infected wih a herpesvirus can sometimes develop keratitis.

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In response to viral infection, the immune systems of mice   [#permalink] 20 Jun 2006, 09:39

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