|
Author |
Message |
|
TAGS:
|
|
|
Manager
Joined: 16 Oct 2003
Posts: 225
Location: India
Followers: 1
Kudos [?]:
0
[0], given: 0
|
The brains of identical twins are genetically identical. [#permalink]
 12 Apr 2004, 13:29
Question Stats:
0% (00:00) correct
100% (01:24) wrong based on 0 sessions
The brains of identical twins are genetically identical. When only one of a pair of identical twins is a schizophrenic, certain areas of the affected twin's brain are smaller than corresponding areas in the brain of the unaffected twin. No such differences are found when neither twin is schizophrenic. Therefore, this discovery provides definitive evidence that schizophrenia is caused by damage to the physical structure of the brain.
If the statements on which the conclusion above is based are all true, each of the following cold be true EXCEPT:
(A) People who lack a genetic susceptibility for the disease will not develop schizophrenia
(B) Medications can control most of the symptoms of schizophrenia inmost patients but will never be able to cure it.
(C) The brains of schizophrenics share many of the characteristics found in those of people without the disorder.
(D) It will eventually be possible to determine whether or not some one will develop schizophrenia on the basis of genetic information alone
(E) Brain abnormalities associated with schizophrenia are the result of childhood viral infections that inhibit the development of brain cells.
_________________
A 750 aspirant.
|
|
|
|
|
|
|
Senior Manager
Joined: 05 Feb 2004
Posts: 417
Location: USA
Followers: 1
Kudos [?]:
1
[0], given: 0
|
B??
|
|
|
|
|
|
GMAT Club Legend
Joined: 15 Dec 2003
Posts: 4441
Followers: 10
Kudos [?]:
82
[0], given: 0
|
Not too sure but I'll go with A on this one
_________________
Best Regards,
Paul
|
|
|
|
|
|
Director
Joined: 03 Jul 2003
Posts: 716
Followers: 2
Kudos [?]:
4
[0], given: 0
|
Is a doctor in the house? 
My Ans: D
|
|
|
|
|
|
Senior Manager
Joined: 02 Mar 2004
Posts: 372
Location: There
Followers: 1
Kudos [?]:
0
[0], given: 0
|
its C
|
|
|
|
|
|
Intern
Joined: 08 Apr 2004
Posts: 38
Location: San Fran
Followers: 0
Kudos [?]:
0
[0], given: 0
|
D)
|
|
|
|
|
|
SVP
Joined: 30 Oct 2003
Posts: 1963
Location: NewJersey USA
Followers: 3
Kudos [?]:
25
[0], given: 0
|
I was going to choose B but D is best I suppose. D actually refutes the argument. As per D the other twin should have gotten schizophrenia.
|
|
|
|
|
|
Senior Manager
Joined: 30 Aug 2003
Posts: 348
Location: dallas , tx
Followers: 1
Kudos [?]:
2
[0], given: 0
|
it is C?
_________________
shubhangi
|
|
|
|
|
|
Senior Manager
Joined: 19 Feb 2004
Posts: 477
Location: Lungi
Followers: 1
Kudos [?]:
1
[0], given: 0
|
its C no doubt about it.
|
|
|
|
|
|
Manager
Joined: 16 Oct 2003
Posts: 225
Location: India
Followers: 1
Kudos [?]:
0
[0], given: 0
|
anandnk wrote: I was going to choose B but D is best I suppose. D actually refutes the argument. As per D the other twin should have gotten schizophrenia.
Well guys.. the OA is D.
Anandnk,
Can you please explain why B is not the answer, and D is? I chose B because nowhere in the argument is anything on medication mentioned.
Thanks
_________________
A 750 aspirant.
|
|
|
|
|
|
SVP
Joined: 30 Oct 2003
Posts: 1963
Location: NewJersey USA
Followers: 3
Kudos [?]:
25
[0], given: 0
|
All the answer choice except D could be true. Since the question is saying "if all the above statements are true" then which of the following could be true.
When selecting an answer to this question get rid of all the choice which could be true.
The stem says identical twins have the same gentic composition in the brain but one developed schizophrenia, If D were true then other twin also should have developed the disease. There must be someother factor and genetic factor "alone" is not responsible. Hence D is not true.
B is a possibility and hence cannot be the answer.
|
|
|
|
|
|
Manager
Joined: 16 Oct 2003
Posts: 225
Location: India
Followers: 1
Kudos [?]:
0
[0], given: 0
|
anandnk wrote: All the answer choice except D could be true. Since the question is saying "if all the above statements are true" then which of the following could be true.
When selecting an answer to this question get rid of all the choice which could be true.
The stem says identical twins have the same gentic composition in the brain but one developed schizophrenia, If D were true then other twin also should have developed the disease. There must be someother factor and genetic factor "alone" is not responsible. Hence D is not true.
B is a possibility and hence cannot be the answer.
Thanks anandnk. I got it now. Its really intriguing how a simple word like 'alone' can make so much of a difference.
_________________
A 750 aspirant.
|
|
|
|
|
|
Intern
Joined: 08 Apr 2004
Posts: 38
Location: San Fran
Followers: 0
Kudos [?]:
0
[0], given: 0
|
Aspire,
You asked:
"Can you please explain why B is not the answer, and D is? I chose B because nowhere in the argument is anything on medication mentioned."
Anandh answered the "why D is true" part.
A tip : When the test maker explicitly handles you a bait like (B) look at it a little more carefully  .
For example ...here is another choice (F)
(F) "All schizophrenics i know love to dance the salsa and eat potato chips."
While nothing is mentioned in the passage to support this conclusion ...nothin prevents this from being true . Hence (F) *COULD* be true. Likewise with (B)
-Hope that helps
|
|
|
|
|
|
GMAT Club Legend
Joined: 15 Dec 2003
Posts: 4441
Followers: 10
Kudos [?]:
82
[0], given: 0
|
Nice explanation Version2, Anandnk. Your explanations are great and will help other people, including me, better understand such monstruous CR 
_________________
Best Regards,
Paul
|
|
|
|
|
|
Manager
Joined: 16 Oct 2003
Posts: 225
Location: India
Followers: 1
Kudos [?]:
0
[0], given: 0
|
Version2 wrote: Aspire, You asked: "Can you please explain why B is not the answer, and D is? I chose B because nowhere in the argument is anything on medication mentioned." Anandh answered the "why D is true" part. A tip : When the test maker explicitly handles you a bait like (B) look at it a little more carefully . For example ...here is another choice (F) (F) "All schizophrenics i know love to dance the salsa and eat potato chips." While nothing is mentioned in the passage to support this conclusion ...nothin prevents this from being true . Hence (F) *COULD* be true. Likewise with (B) -Hope that helps This question is for you, Paul and Anandnk. I agree that B could be true despite the fact that nothing about 'medication' is mentioned in the argument. But I have learned somewhere that one should be within the scope of the CR argument always. I thought B is out of scope because of the word 'medication' and so I quickly discarded it.
Please clarify.
_________________
A 750 aspirant.
|
|
|
|
|
|
Intern
Joined: 08 Apr 2004
Posts: 38
Location: San Fran
Followers: 0
Kudos [?]:
0
[0], given: 0
|
Aspire,
Good Point. In *general* what you said is true .....not always.
I merely gave an 'extreme' to illustrate that what is '*definitely* not true' is better than 'what *might* not be true'
Consider the following things.
If B) is outside the scope i would argue that E) is too since E) is making a point about a *viral cause* for schizophernia and there is nothing in the argument which specifically relates to *cause* . It could be caused by bacteria or maybe because the person was born on a full moon:-).
There are some reasonable assertions which tell you why B) could perhaps be true. For eg the passage talks about *physical brain damage* and as you know while medicines might be able to cure the symptoms it can't grow that part of the brain back ..so there can never be a permanent cure
Eventually its about picking the better answer ..which is why it makes sense to go through all the choices
--Hope it helps
|
|
|
|
|
|
Manager
Joined: 16 Oct 2003
Posts: 225
Location: India
Followers: 1
Kudos [?]:
0
[0], given: 0
|
Version2 wrote: Aspire,
Good Point. In *general* what you said is true .....not always.
I merely gave an 'extreme' to illustrate that what is '*definitely* not true' is better than 'what *might* not be true'
Consider the following things.
If B) is outside the scope i would argue that E) is too since E) is making a point about a *viral cause* for schizophernia and there is nothing in the argument which specifically relates to *cause* . It could be caused by bacteria or maybe because the person was born on a full moon:-).
There are some reasonable assertions which tell you why B) could perhaps be true. For eg the passage talks about *physical brain damage* and as you know while medicines might be able to cure the symptoms it can't grow that part of the brain back ..so there can never be a permanent cure
Eventually its about picking the better answer ..which is why it makes sense to go through all the choices
--Hope it helps
Thanks version2. That is one nice explanation. Henceforth I will read all the choices carefully.
_________________
A 750 aspirant.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Moderators:
metallicafan, rajeevrks27, souvik101990, PTK, MacFauz, noboru, kissthegmat, carcass, willigetmylifeback, mikemcgarry, doe007, Vercules, Legendaddy, tuanquang269, RaviChandra, Marcab, Narenn
|
close
