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Foods high in tryptophan, an amino acid that is a precursor to seroton

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Foods high in tryptophan, an amino acid that is a precursor to seroton  [#permalink]

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New post 19 Feb 2015, 01:04
2
8
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

94% (00:42) correct 6% (01:00) wrong based on 1013 sessions

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This question is part of the GMAT Club Sentence Correction : Parallelism" Revision Project.

Foods high in tryptophan, an amino acid that is a precursor to serotonin, can help people to fall asleep by reducing anxiety, relaxing the brain, and in regulating the sleep cycle.


A. reducing anxiety, relaxing the brain, and in regulating

B. means of reducing anxiety, relaxing the brain, and in the regulation of

C. reducing anxiety, relaxing the brain, and regulation of

D. reducing anxiety, relaxing the brain, and regulating

E. means of reducing anxiety, relaxing the brain, and regulating

Spoiler: :: OE
A list of three things is underlined in the original sentence, indicating the need to test
the sentence for parallelism. According to the non-underlined portion of the sentence,
the three verbs starting each item in the list indicate how the substance (tryptophan)
helps people to fall asleep: by "reducing", "relaxing" and "regulating." At first glance, it
appears that these 3 verbs - each ending in "ing" - are nicely parallel. However,
consider that the list is introduced by the preposition "by." It should read "by x, y, and
z" where x, y, and z are parallel. Instead, the list reads "by x, y, and in z." The use of
the word "in" to introduce the third element in the list throws off the parallelism and
creates a nonsensical phrase: "by . . .in regulating."
(A) This choice is incorrect because it repeats the original sentence.
(B) This choice does not correct the original parallelism error; it still uses "in" to
introduce the third item in the list. Moreover, that third item--"the regulation of"--is no
longer in the "ing" form, further distorting the parallel structure. Finally, the choice
creates a new problem. "By" is sufficient to introduce the three items in the list; "by
means of" is redundant.
(C) This choice correctly omits the word "in" when introducing the third item on the
list. However, the phrase "regulation of" is no longer parallel with the "ing" endings of
the first two items on the list.
(D) CORRECT. This choice corrects the original error by omitting the word "in" when
introducing the third item on the list. The three items now follow the parallel structure
"by x, y, and z."
(E) This choice corrects the original error by omitting the word "in" when introducing
the third item on the list. The three items now follow the parallel structure "by x, y, and
z." The choice creates a new problem, however. "By" is sufficient to introduce the
three items in the list; "by means of" is redundant.

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Re: Foods high in tryptophan, an amino acid that is a precursor to seroton  [#permalink]

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New post 20 Feb 2015, 11:50
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souvik101990 wrote:
This question is part of the GMAT Club Sentence Correction : Parallelism" Revision Project.

Foods high in tryptophan, an amino acid that is a precursor to serotonin, can help people to fall asleep by reducing anxiety, relaxing the brain, and in regulating the sleep cycle.

A. reducing anxiety, relaxing the brain, and in regulating

B. means of reducing anxiety, relaxing the brain, and in the regulation of

C. reducing anxiety, relaxing the brain, and regulation of

D. reducing anxiety, relaxing the brain, and regulating

E. means of reducing anxiety, relaxing the brain, and regulating


Though option D is grammatically correct, Option D and E have a very suttle difference.
while option D suggests that it is the FOOD itself which reduce anxiety etc.., option E makes it clear that FOOD is acting as a means of achieving lower anxiety etc..
option E is right answer IMO.
thanks
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Re: Foods high in tryptophan, an amino acid that is a precursor to seroton  [#permalink]

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New post 19 Feb 2015, 04:43
Foods high in tryptophan, an amino acid that is a precursor to serotonin, can help people to fall asleep by
reducing anxiety,
relaxing the brain,
and
in regulating the sleep cycle.

A. reducing anxiety, relaxing the brain, and in regulating

B. means of reducing anxiety, relaxing the brain, and in the regulation of

C. reducing anxiety, relaxing the brain, and regulation of

D. reducing anxiety, relaxing the brain, and regulating - correct.

E. means of reducing anxiety, relaxing the brain, and regulating
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New post 20 Feb 2015, 10:11
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D seems to be most parallel, since it says "reducing", "relaxing" and "regulating". Seems quite straightforward.
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New post 20 Feb 2015, 19:26
2
Lucky2783 wrote:
Though option D is grammatically correct, Option D and E have a very suttle difference.
while option D suggests that it is the FOOD itself which reduce anxiety etc.., option E makes it clear that FOOD is acting as a means of achieving lower anxiety etc..
option E is right answer IMO.

But why can't food itself reduce anxiety etc.? Moreover, this is what the original sentence says.

So, I feel that E in that sense actually changes the meaning of the original sentence.
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Re: Foods high in tryptophan, an amino acid that is a precursor to seroton  [#permalink]

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New post 20 Feb 2015, 20:04
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damyanti wrote:
Lucky2783 wrote:
Though option D is grammatically correct, Option D and E have a very suttle difference.
while option D suggests that it is the FOOD itself which reduce anxiety etc.., option E makes it clear that FOOD is acting as a means of achieving lower anxiety etc..
option E is right answer IMO.

But why can't food itself reduce anxiety etc.? Moreover, this is what the original sentence says.

So, I feel that E in that sense actually changes the meaning of the original sentence.


I think you are right. After reading through this small article on usage of meansof/meansto , i feel E Is wrong.

http://magoosh.com/gmat/2012/gmat-sente ... -means-to/
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New post 22 Feb 2015, 00:08
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Thanks. The Magoosh link you have provided gives a very good explanation.
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Re: Foods high in tryptophan, an amino acid that is a precursor to seroton  [#permalink]

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New post 25 Apr 2016, 11:00
souvik101990 wrote:
This question is part of the GMAT Club Sentence Correction : Parallelism" Revision Project.

Foods high in tryptophan, an amino acid that is a precursor to serotonin, can help people to fall asleep by reducing anxiety, relaxing the brain, and in regulating the sleep cycle.

A. reducing anxiety, relaxing the brain, and in regulating

B. means of reducing anxiety, relaxing the brain, and in the regulation of

C. reducing anxiety, relaxing the brain, and regulation of

D. reducing anxiety, relaxing the brain, and regulating

E. means of reducing anxiety, relaxing the brain, and regulating



Only (D) has the correct parallelism usage hence (D) is the correct answer !! :-D :lol:
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New post 19 Feb 2017, 10:07
damyanti wrote:
D seems to be most parallel, since it says "reducing", "relaxing" and "regulating". Seems quite straightforward.


My confusion is with the usage of the comma before ''and''. "...relaxing the brain, and...".
Is it correct to add a comma before "and".
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Re: Foods high in tryptophan, an amino acid that is a precursor to seroton  [#permalink]

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New post 19 Feb 2017, 11:59
sriramiitr wrote:
damyanti wrote:
D seems to be most parallel, since it says "reducing", "relaxing" and "regulating". Seems quite straightforward.


My confusion is with the usage of the comma before ''and''. "...relaxing the brain, and...".
Is it correct to add a comma before "and".


When we introduce a list of items [INDEPENDENT CLAUSES] in which each item is separated by comma, we put a comma before 'and' after which we introduce the last item of the list.
you can find further clarity in link below -

https://www.manhattanprep.com/gmat/forums/use-of-comma-and-t14975.html
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Re: Foods high in tryptophan, an amino acid that is a precursor to seroton  [#permalink]

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New post 22 Jul 2019, 22:15
Foods high in tryptophan, an amino acid that is a precursor to serotonin, can help people to fall asleep by reducing anxiety, relaxing the brain, and in regulating the sleep cycle.

A is incorrect because the prepositional "in regulating" now suggests trpto helps in regulating instead of regulating the sleep cycle actually aiding someone in failing asleep. Simply put, it violates parallelism, but there is much more logic at play.

B - same issues arise in the use of the prepositional "in the..". In addition, "by means of reducing" and "by reducing" are exactly the same in this context. Here we are stating 3 mechanisms by which tryptophan can aid someone. Incorrect

C is incorrect as the action noun "regulation" now states "by regulation of.." this doesn't make sense. More technically you could state that action nouns aren't parallel to simple gerunds.

D. clearly communicates the 3 mechanisms that help people to fall asleep. Correct

E again by means of is redundant.
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Re: Foods high in tryptophan, an amino acid that is a precursor to seroton   [#permalink] 22 Jul 2019, 22:15
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