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Biologists believe that they have found one of the

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SVP
SVP
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Biologists believe that they have found one of the  [#permalink] New post 20 Nov 2007, 12:07
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A
B
C
D
E

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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
SVP
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 [#permalink] New post 20 Nov 2007, 12:51
I'll go for A as well. we need "tell" because of "substances." also, answer A is parallel with the infinitives, and is idiomatic: both when to become .... and when to remain
CEO
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Re: SC - Biologists [#permalink] New post 20 Nov 2007, 15:45
x2suresh 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


A.

B: ||ism not maintained.
CD: tells is incorrect.

E: will tell is not needed.
Director
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 [#permalink] New post 20 Nov 2007, 17:13
A

substances is plural so choose tell for tells and eliminate C and D

E is awkward.. eliminate

Between A and B use of which time is incorrect, as its should be when for time... so choose A

Amar
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Re: SC - Biologists [#permalink] New post 20 Nov 2007, 17:23
x2suresh 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


Go for 'A'

'B' - both ....or ..... is it correct? for me it is incorrect. it should be both and right??
at which time.....is hanging there no parallel contruction

'C' - tells - plural - incorrect as substances - plural

'D' - Same as 'C' & 'B' - incorrect

'E' - usage of will is not correct.. here it is a discovery..a hypothetical happening, so cannot use future tense
again lacks parallelism
Intern
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 [#permalink] New post 27 Nov 2007, 22:01
Can someone please explain why tells in in correct in B and C
Director
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 [#permalink] New post 27 Nov 2007, 23:49
In C substances is plural so use tell instead of tells...

In B though tell is correctly used, but " which" wrongly modifies, instead use " when"

Amar
Director
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 [#permalink] New post 28 Nov 2007, 02:11
Amardeep Sharma wrote:
In C substances is plural so use tell instead of tells...

In B though tell is correctly used, but " which" wrongly modifies, instead use " when"

Amar


On an interesting, it is 'one of the substances' which could be singular.... :roll:
Director
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 [#permalink] New post 28 Nov 2007, 06:46
kizito2001 wrote:
Can someone please explain why tells in in correct in B and C


'tells' is wrong because 'one of the substances' is followed by 'that'. Since 'that' modifies 'substances', the word following 'that' must agree with 'substances'.

Rule: 'one of the PLURAL + that/who', the word following 'that' must agree w/ PLURAL.
  [#permalink] 28 Nov 2007, 06:46
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