Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack
GMAT Club

 It is currently 23 Mar 2017, 19:14

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Researchers studying the spread of the Black Plague in

Author Message
TAGS:

### Hide Tags

Intern
Joined: 09 Mar 2010
Posts: 39
Concentration: Technology, General Management
Schools: McCombs '14
Followers: 0

Kudos [?]: 16 [1] , given: 17

### Show Tags

20 Sep 2010, 05:25
1
KUDOS
9
This post was
BOOKMARKED
00:00

Difficulty:

35% (medium)

Question Stats:

69% (02:20) correct 31% (01:44) wrong based on 1196 sessions

### HideShow timer Statistics

Researchers studying the spread of the Black Plague in sixteenth-century England claim that certain people survived the epidemic because they carried a genetic mutation, known as Delta-32, that is known to prevent the bacteria that causes the Plague from overtaking the immune system. To support this hypothesis, the researchers tested the direct descendants of the residents of an English town where an unusually large proportion of people survived the Plague. More than half of these descendants tested positive for the mutation Delta-32, a figure nearly three times higher than that found in other locations.

The researchers' hypothesis is based on which of the following assumptions?

A. Delta-32 does not prevent a carrier from contracting any disease other than the Plague.
B. The Plague is not similar to other diseases caused by bacteria.
C. Delta-32 did not exist in its current form until the sixteenth century.
D. No one who tested positive for Delta-32 has ever contracted a disease caused by bacteria.
E. The Plague does not cause genetic mutations such as Delta-32.

[Reveal] Spoiler: OA

Last edited by kalrac on 20 Sep 2010, 06:18, edited 2 times in total.
If you have any questions
New!
Manager
Joined: 25 Aug 2010
Posts: 97
Followers: 1

Kudos [?]: 4 [0], given: 1

### Show Tags

20 Sep 2010, 05:45
Is it E ???
Retired Moderator
Joined: 02 Sep 2010
Posts: 804
Location: London
Followers: 108

Kudos [?]: 985 [0], given: 25

### Show Tags

20 Sep 2010, 06:00
kalrac wrote:
Researchers studying the spread of the Black Plague in sixteenth-century England claim that certain people survived the epidemic because they carried a genetic mutation, known as Delta-32, that is known to prevent the bacteria that causes the Plague from overtaking the immune system. To support this hypothesis, the researchers tested the direct descendants of the residents of an English town where an unusually large proportion of people survived the Plague. More than half of these descendants tested positive for the mutation Delta-32, a figure nearly three times higher than that found in other locations.

The researchers' hypothesis is based on which of the following assumptions?
a) Delta-32 does not prevent a carrier from contracting any disease other than the Plague.There is no mention of other diseases
b) The Plague is not similar to other diseases caused by bacteria.Again no mention of other diseases
c)Delta-32 did not exist in its current form until the sixteenth century.To the contrary if anything the article probably needs the form to stay the same
d)No one who tested positive for Delta-32 has ever contracted a disease caused by bacteria.No mention of any diseases
e)The Plague does not cause genetic mutations such as Delta-32.This is right. It assumes the plague does not cause Delta-32, since it concludes on the reverse causality

OA TBD after discussion.

_________________
Senior Manager
Joined: 25 Feb 2010
Posts: 476
Followers: 4

Kudos [?]: 88 [0], given: 10

### Show Tags

20 Sep 2010, 06:13
This is cause and effect type of question.
E shows that reverse is not possible.
Therefore, E is correct.
_________________

GGG (Gym / GMAT / Girl) -- Be Serious

Its your duty to post OA afterwards; some one must be waiting for that...

Senior Manager
Status: Upset about the verbal score - SC, CR and RC are going to be my friend
Joined: 30 Jun 2010
Posts: 318
Followers: 6

Kudos [?]: 22 [0], given: 6

### Show Tags

20 Sep 2010, 06:34
kalrac wrote:
a) Delta-32 does not prevent a carrier from contracting any disease other than the Plague.
our scope is to discuss on Black Plague not any disease
b) The Plague is not similar to other diseases caused by bacteria.
our scope is to discuss on Black Plague not any other disease
c)Delta-32 did not exist in its current form until the sixteenth century.
form is not relevant for this argument
d)No one who tested positive for Delta-32 has ever contracted a disease caused by bacteria.
Too extreme
e)The Plague does not cause genetic mutations such as Delta-32.

_________________

My gmat story
MGMAT1 - 630 Q44V32
MGMAT2 - 650 Q41V38
MGMAT3 - 680 Q44V37
GMATPrep1 - 660 Q49V31
Knewton1 - 550 Q40V27

Senior Manager
Joined: 06 Jun 2009
Posts: 331
Location: USA
WE 1: Engineering
Followers: 1

Kudos [?]: 77 [0], given: 0

### Show Tags

21 Sep 2010, 06:47
Irrelevant a) Delta-32 does not prevent a carrier from contracting any disease other than the Plague.
Irrelevant b) The Plague is not similar to other diseases caused by bacteria.
Again, irrelevant c)Delta-32 did not exist in its current form until the sixteenth century.
Again, irrelevant d)No one who tested positive for Delta-32 has ever contracted a disease caused by bacteria.
They assumed this to be true, else this would have been a side affect and not the reason to survive the plague. In order for Delta-32 to be the reason of surviving, it had to be present before the plague spread and was not a result of exposure to the bacteria e)The Plague does not cause genetic mutations such as Delta-32.
_________________

All things are possible to those who believe.

Manager
Joined: 27 Jan 2013
Posts: 71
Location: India
Concentration: General Management, Operations
GMAT 1: 740 Q50 V40
GPA: 3.51
WE: Other (Transportation)
Followers: 3

Kudos [?]: 14 [0], given: 38

### Show Tags

04 Apr 2013, 22:33
kalrac wrote:
Researchers studying the spread of the Black Plague in sixteenth-century England claim that certain people survived the epidemic because they carried a genetic mutation, known as Delta-32, that is known to prevent the bacteria that causes the Plague from overtaking the immune system. To support this hypothesis, the researchers tested the direct descendants of the residents of an English town where an unusually large proportion of people survived the Plague. More than half of these descendants tested positive for the mutation Delta-32, a figure nearly three times higher than that found in other locations.

The researchers' hypothesis is based on which of the following assumptions?
a) Delta-32 does not prevent a carrier from contracting any disease other than the Plague.
b) The Plague is not similar to other diseases caused by bacteria.
c)Delta-32 did not exist in its current form until the sixteenth century.
d)No one who tested positive for Delta-32 has ever contracted a disease caused by bacteria.
e)The Plague does not cause genetic mutations such as Delta-32.

Got this question on one of MGMAT CATs. Even after reviewing the problem and reading some posts regarding this I can still not convince myself that E can be the right answer. Here is my submission regarding it -
To support this hypothesis, the researchers tested the direct descendants of the residents of an English town where an unusually large proportion of people survived the Plague. More than half of these descendants tested positive for the mutation Delta-32, a figure nearly three times higher than that found in other locations.
As highlighted these two parts in the argument tell us two things
1. This town had an unusually large number of people who survived the Plague.
2. More than half of the descendants tested positive for DElta-32 in this town, a number three times as high as other locations
Now E says - The Plague does not cause genetic mutations such as Delta-32.
This cannot be assumed as per the argument. Had plague caused the mutations the proportion of people having Delta-32 would have been much higher in other locations where the plague was much more widespread than in this town which had fewer instances of plague.
In fact in this question I feel no answer is correct.
Can some experts enlighten me on this
Senior Manager
Joined: 07 Nov 2012
Posts: 344
Schools: LBS '14 (A)
GMAT 1: 770 Q48 V48
Followers: 193

Kudos [?]: 373 [1] , given: 4

### Show Tags

07 Apr 2013, 02:34
1
KUDOS
Dipankar6435 wrote:
kalrac wrote:
Researchers studying the spread of the Black Plague in sixteenth-century England claim that certain people survived the epidemic because they carried a genetic mutation, known as Delta-32, that is known to prevent the bacteria that causes the Plague from overtaking the immune system. To support this hypothesis, the researchers tested the direct descendants of the residents of an English town where an unusually large proportion of people survived the Plague. More than half of these descendants tested positive for the mutation Delta-32, a figure nearly three times higher than that found in other locations.

The researchers' hypothesis is based on which of the following assumptions?
a) Delta-32 does not prevent a carrier from contracting any disease other than the Plague.
b) The Plague is not similar to other diseases caused by bacteria.
c)Delta-32 did not exist in its current form until the sixteenth century.
d)No one who tested positive for Delta-32 has ever contracted a disease caused by bacteria.
e)The Plague does not cause genetic mutations such as Delta-32.

Got this question on one of MGMAT CATs. Even after reviewing the problem and reading some posts regarding this I can still not convince myself that E can be the right answer. Here is my submission regarding it -
To support this hypothesis, the researchers tested the direct descendants of the residents of an English town where an unusually large proportion of people survived the Plague. More than half of these descendants tested positive for the mutation Delta-32, a figure nearly three times higher than that found in other locations.
As highlighted these two parts in the argument tell us two things
1. This town had an unusually large number of people who survived the Plague.
2. More than half of the descendants tested positive for DElta-32 in this town, a number three times as high as other locations
Now E says - The Plague does not cause genetic mutations such as Delta-32.
This cannot be assumed as per the argument. Had plague caused the mutations the proportion of people having Delta-32 would have been much higher in other locations where the plague was much more widespread than in this town which had fewer instances of plague.
In fact in this question I feel no answer is correct.
Can some experts enlighten me on this

Hi dipankar,

The key thing you need to think about is the difference between the number of people who contracted the plague and the number of people who survived it.

The question talks about people who survive it, whilst you talk about numb of people who contract it.

Re-look in this light and it should be clearer....
_________________

Former GMAT Pill student, now on staff. Used GMATPILL OG 12 and nothing else: 770 (48,48) & 6.0

... and more

Manager
Joined: 14 Nov 2008
Posts: 69
Followers: 2

Kudos [?]: 23 [5] , given: 1

### Show Tags

30 Aug 2013, 02:36
5
KUDOS
The researchers claim that Delta-32 prevents its carriers from contracting the
Plague. They support this claim by noting that a strikingly large percentage of
descendants of Plague survivors carry the mutation. We are asked to find an
assumption underlying the claim.
(A) The argument is specific to the relationship between Delta-32 and resistance
to the Plague. Other diseases are irrelevant.
(B) Again, the argument is specific to the relationship between Delta-32 and
resistance to the Plague. Other diseases are irrelevant.
(C) Delta-32 may have existed in its current form before the sixteenth century
and the merit of the argument would not change.
(D) The argument does not claim that Delta-32 prevents all bacteria-caused
disease.
(E) CORRECT. The researchers claim that Delta-32 prevented its carriers from
contracting the Plague on the basis of its presence in descendants of Plague
survivors. But it is theoretically possible that these descendants carry the
mutation Delta-32 because the Plague mutated the genes of their ancestors. In
order to claim that the mutation prevented the Plague, we must assume that the
Plague did not cause the mutation Delta-32.
Intern
Joined: 13 Apr 2011
Posts: 15
Followers: 1

Kudos [?]: 28 [1] , given: 7

### Show Tags

06 May 2014, 16:51
1
KUDOS
Researchers studying the spread of the Black Plague in sixteenth-century England claim that certain people survived the epidemic because they carried a genetic mutation, known as Delta-32, that is known to prevent the bacteria that causes the Plague from overtaking the immune system. To support this hypothesis, the researchers tested the direct descendants of the residents of an English town where an unusually large proportion of people survived the Plague. More than half of these descendants tested positive for the mutation Delta-32, a figure nearly three times higher than that found in other locations.

The researchers' hypothesis is based on which of the following assumptions?
a) Delta-32 does not prevent a carrier from contracting any disease other than the Plague.
b) The Plague is not similar to other diseases caused by bacteria.
c)Delta-32 did not exist in its current form until the sixteenth century.
d)No one who tested positive for Delta-32 has ever contracted a disease caused by bacteria.
e)The Plague does not cause genetic mutations such as Delta-32

Conclusion: People survived the plague because they carried a genetic mutation Delta 32.

Negating each option, E stands out to break the conclusion.

-E = The plague causes the genetic mutation such as Delta 32. If the plague itself causes the mutation than all the people effected by the plague will possess the mutation which is the explanation for the premise provided.

Hence E.
Intern
Joined: 08 Oct 2014
Posts: 3
Followers: 0

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

### Show Tags

15 Dec 2014, 04:44
Researchers studying the spread of the Black Plague in sixteenth-century England claim that certain people survived the epidemic because they carried a genetic mutation, known as Delta-32, that is known to prevent the bacteria that causes the Plague from overtaking the immune system. To support this hypothesis, the researchers tested the direct descendants of the residents of an English town where an unusually large proportion of people survived the Plague. More than half of these descendants tested positive for the mutation Delta-32, a figure nearly three times higher than that found in other locations.

The researchers' hypothesis is based on which of the following assumptions?
a) Delta-32 does not prevent a carrier from contracting any disease other than the Plague.
b) The Plague is not similar to other diseases caused by bacteria.
c)Delta-32 did not exist in its current form until the sixteenth century.
d)No one who tested positive for Delta-32 has ever contracted a disease caused by bacteria.
e)The Plague does not cause genetic mutations such as Delta-32

Premise 1: Researchers claim that genetic mutation (D-32) prevent the bacteria that spread plague.
Premise 2: Researchers tested the descendants to assure this hypothesis, and more than 1/2 of it tested positive

Conclusion: The results supports the hypothesis

A) Irrelevant: we're not talking about any other disease other than plague, and it doesn't support the hypothesis.
B) Irrelevant: Same as A,We're not comparing other diseases caused by bacteria.
C) Out of Scope: The existence of D-32 is not the concern here.
D) Confusing : May be tempting, cause of other tests is also not the concern here.
E) Correct: May sound confusing, but if we negate this it totally destroys the conclusion.
GMAT Club Legend
Joined: 01 Oct 2013
Posts: 10670
Followers: 957

Kudos [?]: 213 [0], given: 0

### Show Tags

17 Jul 2016, 19:47
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Intern
Joined: 04 Feb 2015
Posts: 5
Location: India
Concentration: Technology, General Management
Schools: ISB '17
GMAT 1: 640 Q49 V28
GMAT 2: 680 Q50 V30
GPA: 3.9
Followers: 0

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

### Show Tags

16 Oct 2016, 07:02
Cause: Delta 32 mutation Effect: Prevention of plague
In cause and effect questions its assumed that effect does not lead to cause. Choice D points out that relation.
Re: Researchers studying the spread of the Black Plague in   [#permalink] 16 Oct 2016, 07:02
Similar topics Replies Last post
Similar
Topics:
4 CR Revision: Researchers studying the spread of the Black Plague in 7 31 Jan 2016, 23:59
8 Assumption Revision: Researchers studying the spread 7 22 Feb 2015, 21:20
2 A researcher studying corporate executives 2 01 Aug 2014, 19:10
2 Researchers studying the spread of the Black Plague in 3 07 Jul 2012, 06:08
Researchers studying the spread of the Black Plague in 5 22 Apr 2012, 10:44
Display posts from previous: Sort by

# Researchers studying the spread of the Black Plague in

 Powered by phpBB © phpBB Group and phpBB SEO 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®.