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Researchers studying the spread of the Black Plague in [#permalink]
 20 Sep 2010, 05:25
Question Stats:
56% (02:25) correct
43% (01:23) wrong based on 89 sessions
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. Please post the answers with explanations.
Last edited by kalrac on 20 Sep 2010, 06:18, edited 2 times in total.
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Re: Researchers studying the spread of the Black Plague [#permalink]
20 Sep 2010, 05:45
Is it E ???
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Re: Researchers studying the spread of the Black Plague [#permalink]
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.
Please post the answers with explanations.
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Re: Researchers studying the spread of the Black Plague [#permalink]
20 Sep 2010, 06:13
This is cause and effect type of question. E shows that reverse is not possible. Therefore, E is correct.
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Re: Researchers studying the spread of the Black Plague [#permalink]
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.
should be the answer
Please post the answers with explanations.
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Re: Researchers studying the spread of the Black Plague [#permalink]
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.
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Re: Researchers studying the spread of the Black Plague in [#permalink]
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.
Please post the answers with explanations. 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 
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Re: Researchers studying the spread of the Black Plague in [#permalink]
07 Apr 2013, 02:34
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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.
Please post the answers with explanations. 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....
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Re: Researchers studying the spread of the Black Plague in
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07 Apr 2013, 02:34
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