Biologists believe !!

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Biologists believe !!

by Kusumita » Thu May 07, 2009 8:11 am
15. 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

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by xcusemeplz2009 » Thu May 07, 2009 8:32 am
IMO with A

As B , C and D are using a wrong idiom and E is having a parallelism error

so obvious choice is A

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by blackarrow » Thu May 07, 2009 10:16 am
Idiom goes Both X and Y; where X and Y are parallel.

Substances will take verb tell and not tells.

Thus choice A takes both correct idiom and subj verb agreement.
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by satish.nagdev » Thu May 07, 2009 11:42 pm
IMO its D, whats OA and source of question?
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by thetenor » Fri May 08, 2009 1:52 pm
blackarrow wrote:Idiom goes Both X and Y; where X and Y are parallel.

Substances will take verb tell and not tells.

Thus choice A takes both correct idiom and subj verb agreement.
here the agreement is between "one of the substances" (one of them) and the verb "tells", isn't? "that" is optional.

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Re: Biologists believe !!

by kanha81 » Fri May 08, 2009 4:31 pm
Kusumita wrote:15. 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
Kusumita,
Welcome to the FORUM!

One of things that you should be strictly adhere is to UNDERLINE the verbage that requires examination. Kindly PLEASE follow the rules of the FORUM.

IMO. [spoiler][A][/spoiler]

[A]- uses correct idiom- both X and Y; one of substances- subject is plural, hence requires plural verb- tell
- wordy- at which time
[C]- wrong idiom
[D]- same as [C]
[E]- wordy and awkward.

what is OA?
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by PAB2706 » Sat May 09, 2009 11:20 pm
IMO D

"one of the" should follow singular verb tells

another thing ONE OF THE SUBSTANCE cannot be active and quisent at the same time...it is talking bout one substance.if there were more than one substance then and could have been considered. but since we are just talking bout one substance it shud be X or Y

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by Vemuri » Mon May 11, 2009 5:25 am
PAB2706 wrote:IMO D

"one of the" should follow singular verb tells

another thing ONE OF THE SUBSTANCE cannot be active and quisent at the same time...it is talking bout one substance.if there were more than one substance then and could have been considered. but since we are just talking bout one substance it shud be X or Y

"One of the" + [Plural Noun] + that/who + [Singular Verb]. As per this definition (source: free GMAT Flashcards) we can narrow down to C & D.

But, again idiom "Both X and Y" is correct, not "Both X or Y". So, C and D are out.

What a paradox :roll: Is the free GMAT Flashcards correct?

BTW, the Biologists are not saying that one of the substances is both active and quisent . They believe that the substance will tell individual genes when to become active and when to remain quiescent.

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by hk » Tue May 12, 2009 8:37 am
I actually have no answer here. "One of the substances" calls for "tells".

And i would have picked D if the option was "tells individual genes both when to become active and when to remain "
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by gmat620 » Tue May 12, 2009 11:34 am
answer is definitely A ...one of PLURAL NOUN + that/who + SINGULAR verb.

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by Stacey Koprince » Thu May 14, 2009 11:45 am
received a PM asking me to respond.

"Biologists believe that they have found one of the <plural noun> that <verb>"
subject - verb - that - subject - verb - object - prepositional phrase - modifier

The second "that" introduces an essential modifier. The modifier describes the preceding noun: the substances that fall into this particular category. The verb, therefore should be plural, and it is plural in the original sentence. The original also uses the idiom "both X and Y," where X and Y are required to be parallel (and they are). So far, everything looks fine. Let's examine the other choices.

Let's also say that you weren't sure whether it should be tell, tells, or will tell. Ignore that issue for now and see what else you can eliminate.

B, C, and D all use the incorrect idiom "both X or Y." Eliminate.

E uses "both X and Y," but X and Y aren't parallel. Eliminate.

That leaves me with A, which uses the plural verb "tell." So, if I didn't know before, now I know that it should be "tell" - which is important if I'm studying, but not important if I'm in the middle of taking the test. :)
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by gmat740 » Thu Jun 04, 2009 12:36 am
Guys,

I came up with this same question while solving Brutal bangus SC Notes.but the Option C is different

I am modifying the Option C
(C) tells individual genes both when to become active and when to remain
But the Official explanation given is OA is A

I am still not convinced.

I find C to be correct.

It uses correct IDIOM Both X and Y
and
one of the Plural Noun + that + singular Verb

Please correct me.

I am getting extremely confused with this rule

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by wishkaro » Thu Jun 04, 2009 1:08 am
Thumb rule: one of the Plural Noun + that + plural Verb ...

Hence A is correct...

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by Stacey Koprince » Thu Jun 04, 2009 6:22 am
The text you posted for your answer choice C is identical to the text posted above for correct answer A. So, yes, if that is the text you see for choice C, then it's also right.

This is why I don't study from random stuff I find on the Internet. When people compile problems on their own from a bunch of different sources, random typos and changes creep in. I only study problems from official materials printed by the official test-makers (or my company's stuff, of course :)).
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by gmat740 » Sat Jun 06, 2009 7:04 am
Thanks stacey!

You have been of great help