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# Biologists believe that they have found one of the

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Manager
Joined: 15 Nov 2006
Posts: 218
Location: Ohio
Biologists believe that they have found one of the [#permalink]

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10 Apr 2007, 15:27
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179. Biologists believe that they have found one of the substances that tell individual genes both when to become active and when to remain quiescent in the earliest phases of an embryoâ€™s development.
(A) tell individual genes both when to become active and when to remain
(B) tell individual genes both at which time they should become active or should remain
(C) tells individual genes both when to become active or remain
(D) tells individual genes both when to become active or when to remain
(E) will tell an individual gene both about when it should become active and remain
Director
Joined: 13 Dec 2006
Posts: 512
Location: Indonesia

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10 Apr 2007, 22:11
I will go with D!!

Explanation

It says "one of the substances", which is singular and hence tells will follow and not the tell, between C and D, D for parallelism.

regards,

Amardeep
SVP
Joined: 08 Nov 2006
Posts: 1554
Location: Ann Arbor
Schools: Ross '10

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10 Apr 2007, 22:30
Amardeep Sharma wrote:
I will go with D!!

Explanation

It says "one of the substances", which is singular and hence tells will follow and not the tell, between C and D, D for parallelism.

regards,

Amardeep

The intent of the sentence is to say that "There are many substances that 'do something'. Scientists have found one of those substances. Even though the scientists found only substance, the action 'do something' is common across all the substances. Thus we need a plural form and I agree with others that A is the best answer.

http://www.gmatclub.com/phpbb/viewtopic ... ht=trenton
VP
Joined: 07 Nov 2005
Posts: 1118
Location: India

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10 Apr 2007, 22:35
A stands correct.

I posted this sometime back.
http://www.gmatclub.com/phpbb/viewtopic.php?t=29044

The correct form is "Both X and Y".
_________________

Trying hard to conquer Quant.

VP
Joined: 07 Nov 2005
Posts: 1118
Location: India

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10 Apr 2007, 22:36
Agree with what ncprasad explained above.
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Trying hard to conquer Quant.

Senior Manager
Joined: 27 Mar 2007
Posts: 329

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11 Apr 2007, 02:24
It is clearly (A), -as already mentioned by buzzgaurav- because of the idiomatic expression '..both X and Y' and it is parallel 'when to become active and when to remain'.

I would suggest to post a clear explanation why something is right/wrong, so all of us can share your knowledge. Even if something is wrong, we all can learn a lot from the nasty traps. It is not useful to post A or B or C or D or E?! Best regards, thank you and cheers!
Director
Joined: 13 Dec 2006
Posts: 512
Location: Indonesia

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11 Apr 2007, 06:01

Point taken, and its a good explanation... thanks pal

regards,

Amardeep
Manager
Joined: 22 Feb 2007
Posts: 165

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11 Apr 2007, 07:41
Both X and Y is correct usage. hence B,C, D are incorrect
The parts after "both" and "and" have to be parallel.

A maintains the parallelism -->
both when to become active and when to remain quiescent

E unnecessarily uses future tense (will tell) and lacks parallelism.

Hence A.
Manager
Joined: 15 Nov 2006
Posts: 218
Location: Ohio

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11 Apr 2007, 15:27
OA is A.

thanks guys!

I was thinking in the same direction as Amardeep and got this one wrong.
11 Apr 2007, 15:27
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