It is currently 20 Nov 2017, 18:07

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

In response to viral infection, the immune systems of mice

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

7 KUDOS received
Senior Manager
Senior Manager
avatar
Joined: 10 Dec 2004
Posts: 273

Kudos [?]: 203 [7], given: 0

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

Show Tags

New post 16 May 2005, 10:10
7
This post received
KUDOS
30
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

68% (01:53) correct 32% (02:30) wrong based on 1630 sessions

HideShow timer Statistics

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

_________________

"Forums are meant to benefit all. No one is interested in knowing what your guesses are. Please explain the reasoning behind the answer you chose. This will also help you organize your thoughts quickly during the exam."

Kudos [?]: 203 [7], given: 0

4 KUDOS received
Intern
Intern
avatar
Joined: 07 Jan 2016
Posts: 31

Kudos [?]: 29 [4], given: 29

Schools: AGSM '18
Re: In response to viral infection, the immune systems of mice [#permalink]

Show Tags

New post 01 Feb 2016, 20:28
4
This post received
KUDOS
The correct answer is D.

When X is thought to cause Y, it's important to consider whether Y occurs even when X is absent: if it does not, that strengthens the notion that X is causing Y in those cases where they occur together (OG)

Kudos [?]: 29 [4], given: 29

2 KUDOS received
Director
Director
avatar
Joined: 14 Sep 2005
Posts: 984

Kudos [?]: 220 [2], given: 0

Location: South Korea
 [#permalink]

Show Tags

New post 06 Nov 2005, 22:55
2
This post received
KUDOS
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.
_________________

Auge um Auge, Zahn um Zahn :twisted: !

Kudos [?]: 220 [2], given: 0

2 KUDOS received
BSchool Thread Master
User avatar
Joined: 28 May 2012
Posts: 135

Kudos [?]: 74 [2], given: 11

Location: India
Concentration: General Management, Strategy
GPA: 3.33
WE: Information Technology (Retail)
Re: In response to viral infection [#permalink]

Show Tags

New post 28 Oct 2012, 01:01
2
This post received
KUDOS
talismaaniac wrote:
getgyan wrote:
+1 D

A. Other types of virus have surface proteins that closely resemble proteins found in various organs of mice. (Then why just eyes are affected, eliminate)
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. (This weakens the hypothesis)
C. Mice that are infected with a herpes virus but do not develop keratitis produce as many antibodies as infected mice that do develop keratitis. (Irrelevant)
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. (This is our answer, since they do not develop antibodies they do not develop keratitis)
E. Mice that have never been infected with a herpes virus can sometimes develop keratitis. (This weakens the hypothesis)

:-D


Hey Gyan!! Nice explanation. I had a tough time understanding this question. Finally my teacher helped me. But I was still confused and could not explain him my problem.
I decoded this prob in the following manner:-

Virus hits mouse - mouse develops antibody (antibody hooking onto protein on virus destroys virus). Now, protein on eye = protein on (herpes)virus. (So, because an antibody might get confused between the two - this was terrific comprehension of the hypothesis) the antibody (hooking onto protein on eye ) leads to keratitis.
Hence, herpesvirus - antibody - keratitis.

My doubt is that how can we strengthen this by saying that (there are mice => some mice - not all - and so this is sometimes and not always) when there is no antibody, there is no keratitis. How does this prove scientists' hypo?
It only mentions that there are mice (can be 4 out of 100) that do not develop antibodies and don't get keratitis. But there can surely be some mice (96) who develop antibodies but don't catch keratitis. Hence, how does D prove scientists' hypo?
I have boldfaced "prove" because I want to ask you do we need to prove that whenever any antibody is formed, keratitis will develop - always?

Because D leaves room for a possibility that 96 mice might develop antibody but still not catch keratitis. Hence not proved. XXXXX

Please help man!! :)


This is a typical strengthen cause and effect problem -

We need to show that only X can lead to the result Y or eliminate any other alternate causes that lead to result Y.

If the cause does not occur then the result does not occur ; Hence , If the cause is there the result is also there.

thanks,
Ankit
_________________

You want something, go get it . Period !

Kudos [?]: 74 [2], given: 11

1 KUDOS received
Senior Manager
Senior Manager
avatar
Joined: 07 Nov 2004
Posts: 452

Kudos [?]: 130 [1], given: 0

 [#permalink]

Show Tags

New post 16 May 2005, 10:21
1
This post received
KUDOS
I pick D. D says if the mice forms antibodies, it will have keratitis.

Kudos [?]: 130 [1], given: 0

1 KUDOS received
BSchool Thread Master
User avatar
Joined: 28 May 2012
Posts: 135

Kudos [?]: 74 [1], given: 11

Location: India
Concentration: General Management, Strategy
GPA: 3.33
WE: Information Technology (Retail)
In response to viral infection, the immune systems of mice [#permalink]

Show Tags

New post 25 Sep 2012, 09:58
1
This post received
KUDOS
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 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 with a herpesvirus can sometimes develop keratitis.

Please explain each answer choice.
_________________

You want something, go get it . Period !

Kudos [?]: 74 [1], given: 11

1 KUDOS received
Senior CR Moderator
User avatar
D
Status: Long way to go!
Joined: 10 Oct 2016
Posts: 1244

Kudos [?]: 1009 [1], given: 60

Location: Viet Nam
GMAT ToolKit User Premium Member CAT Tests
Re: In response to viral infection, the immune systems of mice [#permalink]

Show Tags

New post 17 Dec 2016, 10:59
1
This post received
KUDOS
nathalie1107 wrote:
Dear all,

I have a different angle of view about this argument. I think the ones who select E may have the same thought as me. Could anyone give me a detailed explanation for my reasons below if you see it is flawed?

Based on the last sentence, the hypothesis of the scientists should be: (1) As the some eyes' cells are resemble to that of herpes, keratitis are mistakenly generated on those eyes' cell as a response of antibodies to herpes.
The hypothesis cannot be: (2) Keratitis are generated by antibodies to herpes.

If so, answer E strengthens (1) the best. It demonstrates keratitis can appear without herpes. It provides a signal for further studies that the antibodies mis-recognize eyes' cells as herpes in those cases.
Meanwhile answer D just strengthens (2). But I don't think (2) is a good interpretation of the scientists' hypothesis.


Choice E doesn't strengthen the argument.

E. Mice that have never been infected with a herpesvirus can sometimes develop keratitis.

If choice E is true, then the argument may be wrong. If mice that have never been infected with a herpesvirus can sometimes develop keratitis, keratitis could be caused by other reasons rather than antibodies to herpesvirus. How could we know that keratitis is caused by those antibodies in case that the mice aren't even infected with herpesvirus?
_________________

Actual LSAT CR bank by Broall

How to solve quadratic equations - Factor quadratic equations
Factor table with sign: The useful tool to solve polynomial inequalities
Applying AM-GM inequality into finding extreme/absolute value

New Error Log with Timer

Kudos [?]: 1009 [1], given: 60

Director
Director
avatar
Joined: 03 Nov 2004
Posts: 848

Kudos [?]: 58 [0], given: 0

 [#permalink]

Show Tags

New post 16 May 2005, 10:25
D

Kudos [?]: 58 [0], given: 0

Director
Director
User avatar
Joined: 18 Apr 2005
Posts: 543

Kudos [?]: 37 [0], given: 0

Location: Canuckland
 [#permalink]

Show Tags

New post 16 May 2005, 11:52
D.

Kudos [?]: 37 [0], given: 0

Manager
Manager
avatar
Joined: 08 Mar 2005
Posts: 96

Kudos [?]: 1 [0], given: 0

 [#permalink]

Show Tags

New post 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.

Kudos [?]: 1 [0], given: 0

Senior Manager
Senior Manager
avatar
Joined: 10 Nov 2004
Posts: 286

Kudos [?]: 21 [0], given: 0

 [#permalink]

Show Tags

New post 17 May 2005, 00:43
One more for D

Kudos [?]: 21 [0], given: 0

Manager
Manager
User avatar
Joined: 27 Jul 2004
Posts: 84

Kudos [?]: [0], given: 0

 [#permalink]

Show Tags

New post 17 May 2005, 00:54
D it is

Kudos [?]: [0], given: 0

Director
Director
avatar
Joined: 05 Jan 2005
Posts: 555

Kudos [?]: 23 [0], given: 0

 [#permalink]

Show Tags

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

Kudos [?]: 23 [0], given: 0

SVP
SVP
User avatar
Joined: 28 May 2005
Posts: 1699

Kudos [?]: 480 [0], given: 0

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

Show Tags

New post 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.
_________________

hey ya......

Kudos [?]: 480 [0], given: 0

Senior Manager
Senior Manager
User avatar
Joined: 29 Aug 2005
Posts: 498

Kudos [?]: 14 [0], given: 0

 [#permalink]

Show Tags

New post 07 Nov 2005, 00:14
I think D is correct.

What is the OA?

Kudos [?]: 14 [0], given: 0

Manager
Manager
avatar
Joined: 08 Aug 2005
Posts: 102

Kudos [?]: 2 [0], given: 0

 [#permalink]

Show Tags

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

Kudos [?]: 2 [0], given: 0

SVP
SVP
User avatar
Joined: 28 May 2005
Posts: 1699

Kudos [?]: 480 [0], given: 0

Location: Dhaka
 [#permalink]

Show Tags

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

I was really stuck between D and E.
how did you guyd eliminate E.
_________________

hey ya......

Kudos [?]: 480 [0], given: 0

Director
Director
avatar
Joined: 15 Aug 2005
Posts: 793

Kudos [?]: 75 [0], given: 0

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

Show Tags

New post 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 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 with a herpesvirus can sometimes develop keratitis.
_________________

Cheers, Rahul.

Kudos [?]: 75 [0], given: 0

Director
Director
avatar
Joined: 13 Nov 2003
Posts: 788

Kudos [?]: 64 [0], given: 0

Location: BULGARIA
 [#permalink]

Show Tags

New post 24 Nov 2005, 02:26
think that B) is correct .

Kudos [?]: 64 [0], given: 0

SVP
SVP
User avatar
Joined: 28 May 2005
Posts: 1699

Kudos [?]: 480 [0], given: 0

Location: Dhaka
 [#permalink]

Show Tags

New post 24 Nov 2005, 02:56
1
This post was
BOOKMARKED
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.
_________________

hey ya......

Kudos [?]: 480 [0], given: 0

  [#permalink] 24 Nov 2005, 02:56

Go to page    1   2   3   4    Next  [ 67 posts ] 

Display posts from previous: Sort by

In response to viral infection, the immune systems of mice

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.