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Biologists believe that they have found one of the

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Re: Brutal SC # 14: Biologists believe [#permalink] New post 22 Jun 2011, 12:47
+1 A

"both...and...." requires paralelism. The first word in each of both elements must be of the same type (noun, preposition, etc.).
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Re: Brutal SC # 14: Biologists believe [#permalink] New post 22 Jun 2011, 15:59
One of the [X] + PRONOUN (WHO / THAT) + PLURAL VERB

Choice A
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Re: Brutal SC # 14: Biologists believe [#permalink] New post 17 Jul 2011, 15:51
One of the XYZs means that the sentence has plural subjects. Hence eliminate C, D and E. B is very wordy and not parallel.

Hence A remains.
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Re: Biologists believe that they have found one of the [#permalink] New post 18 Nov 2011, 23:35
got it right !! marked a :)
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Re: Biologists believe that they have found one of the [#permalink] New post 07 Dec 2011, 07:52
A wins over B because it is concise.
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Re: Biologists believe that they have found one of the [#permalink] New post 02 Jan 2014, 17:46
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Re: Biologists believe that they have found one of the [#permalink] New post 12 Apr 2014, 01:42
Hussain15 wrote:
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 embryo’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

Kindly explain the reasoning against each option!


The rule that i picked up from a discussion for a similar question:

one of +noun(prural)+that/who takes prural verb
one of + noun(prural) without a relative ronoun takes singular

Hence, C and D are out, and A is parallel, Hence A....

~Nityam
Re: Biologists believe that they have found one of the   [#permalink] 12 Apr 2014, 01:42
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