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# SC 1000 question ¹ 179

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Senior Manager
Joined: 13 Mar 2007
Posts: 294
Location: Russia, Moscow
SC 1000 question ¹ 179 [#permalink]

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23 May 2007, 05:12
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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 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
Manager
Joined: 14 May 2007
Posts: 181

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23 May 2007, 05:20
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 embryo’s development.

(A) tell individual genes both when to become active and when to remain
=> "tell" wrong

(B) tell individual genes both at which time they should become active or should remain => "tell" wrong e.g. one of the things that i will tell you is the correct use of verbs

(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 => "will tell" wrong tense

Between C & D

cause : when to remain active or when to remain qu...in the ..
gives out the meaning that remaining active is not in the earliest phases of an embryo’s development
Manager
Joined: 09 Nov 2006
Posts: 128

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23 May 2007, 07:35
A

Actually, "tells" is wrong bcoz we have "one of SUBSTANCES (pl) that"
Manager
Joined: 14 May 2007
Posts: 181

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23 May 2007, 08:23
i tend to disagree !!

SUBSTANCES (pl) are not doing the action here
one of the substance is doing the action !!

what is the OA ??
Manager
Joined: 23 Mar 2007
Posts: 173

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23 May 2007, 09:35
I guess "substances" are doing the action , so we need "tell". In that case answer has to be A.
Manager
Joined: 21 Mar 2007
Posts: 50

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23 May 2007, 11:56
Best answer seems to be A

B is wordy, C and D are wrong because "" substances "' are doing the action here, and one of such substance is being talked about here.
E is wrong again because it kinda changes the meaning and structure of the sentence
Senior Manager
Joined: 13 Mar 2007
Posts: 294
Location: Russia, Moscow

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23 May 2007, 23:44
OA is A
Director
Joined: 29 Aug 2005
Posts: 500

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24 May 2007, 06:34
(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 - Idiom
(C) tells individual genes both when to become active or remain - Idiom
(D) tells individual genes both when to become active or when to remain - Idiom
(E) will tell an individual gene both about when it should become active and remain - Idiom

B, C, D & E - are eliminated 'coz they donot use the correct idiom.
It should be both X and Y

We are left with A

Hence A should be the answer.
Manager
Joined: 30 Mar 2007
Posts: 215

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24 May 2007, 13:37
Manager
Joined: 22 May 2007
Posts: 218

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30 May 2007, 12:27
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 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

(A) and (D) are wrong because cannot remain active and quiescent at the same time. "And" is wrong
"One" of the substances must be singular and must use tells

(c) is correct
C   [#permalink] 30 May 2007, 12:27
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