GMATPrep Incarnation of Not X, but Y

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GMATMadeEasy: Legendary Member; Posts: 768; Joined: Mon Nov 30, 2009 3:46 amFollowed by: 7 members; Thanked: 21 times

by GMATMadeEasy » Fri Nov 12, 2010 4:13 pm

A new genetically engineered papaya was produced not by seed companies who have been motivated by profit, which was the case with most genetically modified crops previously approved for commercial use, but university and United States Department of Agriculture researchers who allowed growers to use it free of charge.

(A) produced not by seed companies who have been motivated by profit, which was the case with most genetically modified crops previously approved for commercial use, but
(B) produced not by profit-motivated seed companies, the case with most genetically modified crops previously approved for commercial use, but
(C) produced not by profit-motivated seed companies, as was the case with most genetically modified crops previously approved for commercial use, but by
(D) not produced by profit-motivated seed companies, which was the case with most genetically modified crops previously approved for commercial use, but was produced by
(E) not produced by seed companies who have been motivated by profit, the case with most genetically modified crops previously approved for commercial use, but by

I have simple question; What are different consqtruct of Not X, but Y parallelism that are correct ?

Last edited by GMATMadeEasy on Sat Nov 13, 2010 10:43 am, edited 1 time in total.

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Source: Beat The GMAT — Sentence Correction | Fri Nov 12, 2010 4:13 pm

frank1: Legendary Member; Posts: 537; Joined: Fri Jan 22, 2010 10:06 pmFollowed by: 1 member; Thanked: 14 times

by frank1 » Fri Nov 12, 2010 5:30 pm

GMATMadeEasy wrote:A new genetically engineered papaya was produced not by seed companies who have been motivated by profit, which was the case with most genetically modified crops previously approved for commercial use, but university and United States Department of Agriculture researchers who allowed growers to use it free of charge.

(A) produced not by seed companies who have been motivated by profit, which was the case with most genetically modified crops previously approved for commercial use, but
(B) produced not by profit-motivated seed companies, the case with most genetically modified crops previously approved for commercial use, but
(C) produced not by profit-motivated seed companies, as was the case with most genetically modified crops previously approved for commercial use, but by
(D) not produced by profit-motivated seed companies, which was the case with most genetically modified crops previously approved for commercial use, but was produced by
(E) not produced by seed companies who have been motivated by profit, the case with most genetically modified crops previously approved for commercial use, but by

I have simple question; What are different consqtruct of Not X, but Y parallelism that are correct ?

I think not by X but by Y parallelism wise only C,D,E qualifies....
D has modifier problem.....seed companies, which was the case
and E has ...companies who have been.....which is wrong ...
so IMO C

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EducationAisle: Master | Next Rank: 500 Posts; Posts: 434; Joined: Sat Mar 27, 2010 10:42 pmFollowed by: 46 members; Location: Bangalore, India; Thanked: 91 times

by EducationAisle » Sat Nov 13, 2010 9:47 am

GMATMadeEasy wrote:
I have simple question; What are different construct of Not X, but Y parallelism that are correct ?

In all questions of this type, just make sure the 'remainder' of the sentence (outside of NOT X BUT Y) makes 'sense' with both X and Y.

A -> A new genetically engineered papaya was produced NOT X BUT Y

B -> A new genetically engineered papaya was produced NOT X BUT Y

C -> A new genetically engineered papaya was produced NOT X BUT Y

D -> A new genetically engineered papaya was NOT X BUT Y

E -> A new genetically engineered papaya was NOT X BUT Y

Now, you would see that this 'remainder of the sentence' does not make sense in any other option except in C. Lets take D as an example.

In D,

X -> produced by profit-motivated seed companies, which....

Y -> was produced by university and United States Department..

D would read:

A new genetically engineered papaya was (produced by profit-motivated seed companies, which...... ) X - Makes sense

A new genetically engineered papaya was (was produced by university and United States Department ) Y - Does not make sense (notice two 'was')

This way, you can easily invalidate all options but C.

Ashish
MBA - ISB, GMAT - 99th Percentile
GMAT Faculty @ EducationAisle
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GMATMadeEasy: Legendary Member; Posts: 768; Joined: Mon Nov 30, 2009 3:46 amFollowed by: 7 members; Thanked: 21 times

by GMATMadeEasy » Sat Nov 13, 2010 10:42 am

Ashish, thanks. this sounds great .

Is this approach applicable in general always ?

(D) not produced by profit-motivated seed companies, which was the case with most genetically modified crops previously approved for commercial use, but was produced by

If I re-write to the version below assuming that there is no modifier in bewteen, it is incorrect following your reasoing . Is it wrong ? I am not able to decide .

(D) not produced by profit-motivated seed companies, but was produced by

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EducationAisle: Master | Next Rank: 500 Posts; Posts: 434; Joined: Sat Mar 27, 2010 10:42 pmFollowed by: 46 members; Location: Bangalore, India; Thanked: 91 times

by EducationAisle » Sat Nov 13, 2010 7:49 pm

Yes, D is incorrect.

As I mentioned, if you follow this approach, only C would emerge as the correct answer.

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GMATMadeEasy: Legendary Member; Posts: 768; Joined: Mon Nov 30, 2009 3:46 amFollowed by: 7 members; Thanked: 21 times

by GMATMadeEasy » Sun Nov 14, 2010 4:02 am

Thanks a lot . I have a similar question, how we will resolve it between C and D .

Paleontologist Stephen Jay Gould has argued that many biological traits are not the products of natural selection, favored due to their enhancement of reproduction or survival, but that they are simply random by-products of other evolutionary developments.

(A) due to their enhancement of reproduction or survival, but that they are
(B) due to the reproduction or survival they enhance, but they are
(C) because they enhance reproduction or survival, but
(D) because they enhance reproduction or survival, but are
(E) because of enhancing reproduction or survival, but are

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tomada: Master | Next Rank: 500 Posts; Posts: 406; Joined: Mon Jan 25, 2010 11:36 amFollowed by: 4 members; Location: Syracuse, NY; Thanked: 23 times; GMAT Score:740

by tomada » Sun Nov 14, 2010 8:32 am

In (E), why is "...companies who have been.." incorrect? Isn't this merely describing the nature of the companies? Is it grammatically incorrect, or just not as good as choice (C) ?

frank1 wrote:
GMATMadeEasy wrote:A new genetically engineered papaya was produced not by seed companies who have been motivated by profit, which was the case with most genetically modified crops previously approved for commercial use, but university and United States Department of Agriculture researchers who allowed growers to use it free of charge.

(A) produced not by seed companies who have been motivated by profit, which was the case with most genetically modified crops previously approved for commercial use, but
(B) produced not by profit-motivated seed companies, the case with most genetically modified crops previously approved for commercial use, but
(C) produced not by profit-motivated seed companies, as was the case with most genetically modified crops previously approved for commercial use, but by
(D) not produced by profit-motivated seed companies, which was the case with most genetically modified crops previously approved for commercial use, but was produced by
(E) not produced by seed companies who have been motivated by profit, the case with most genetically modified crops previously approved for commercial use, but by

I have simple question; What are different consqtruct of Not X, but Y parallelism that are correct ?
I think not by X but by Y parallelism wise only C,D,E qualifies....
D has modifier problem.....seed companies, which was the case
and E has ...companies who have been.....which is wrong ...
so IMO C

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