GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 23 Jun 2018, 20:29

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Before scientists learned how to make a synthetic growth hormone, remo

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

6 KUDOS received
Senior Manager
Senior Manager
avatar
Joined: 29 Jul 2009
Posts: 291
Before scientists learned how to make a synthetic growth hormone, remo [#permalink]

Show Tags

New post Updated on: 31 Aug 2017, 09:10
6
27
00:00
A
B
C
D
E

Difficulty:

  65% (hard)

Question Stats:

53% (00:44) correct 47% (00:50) wrong based on 926 sessions

HideShow timer Statistics

Before scientists learned how to make a synthetic growth hormone, removing it painstakingly in small amounts from the pituitary glands of human cadavers.

(A) scientists learned how to make a synthetic growth hormone, removing it painstakingly

(B) scientists had learned about making a synthetic growth hormone, they had to remove it painstakingly

(C) scientists learned how to synthesize the growth hormone, it had to be painstakingly removed

(D) learning how to make a synthetic growth hormone, scientists had to remove it painstakingly

(E) learning how to synthesize the growth hormone, it had to be painstakingly removed by scientists

Originally posted by mikeCoolBoy on 18 Sep 2009, 06:40.
Last edited by hazelnut on 31 Aug 2017, 09:10, edited 1 time in total.
Reformatted the question.
3 KUDOS received
Senior Manager
Senior Manager
avatar
Joined: 18 Aug 2009
Posts: 291
Re: Before scientists learned how to make a synthetic growth hormone, remo [#permalink]

Show Tags

New post 18 Sep 2009, 10:28
3
A) scientists learned how to make a synthetic growth hormone, removing it painstakingly - Wrong way to phrase the sentence.
B) scientists had learned about making a synthetic growth hormone, they had to remove it painstakingly - Use of "had" 2 times is wrong.
C) scientists learned how to synthesize the growth hormone, it had to be painstakingly removed - part marked in RED changes the meaning of the sentence. Scientists did not learn to synthesize the hramone itself, they just learned how to make the synthetic harmone.
D) learning how to make a synthetic growth hormone, scientists had to remove it painstakingly - correct and only remaining answer.
E) learning how to synthesize the growth hormone, it had to be painstakingly removed by scientists - Same as C.
2 KUDOS received
Director
Director
avatar
Joined: 05 Jun 2009
Posts: 683
WE 1: 7years (Financial Services - Consultant, BA)
Re: Before scientists learned how to make a synthetic growth hormone, remo [#permalink]

Show Tags

New post 18 Sep 2009, 10:31
2
hgp2k wrote:
A) scientists learned how to make a synthetic growth hormone, removing it painstakingly - Wrong way to phrase the sentence.
B) scientists had learned about making a synthetic growth hormone, they had to remove it painstakingly - Use of "had" 2 times is wrong.
C) scientists learned how to synthesize the growth hormone, it had to be painstakingly removed - part marked in RED changes the meaning of the sentence. Scientists did not learn to synthesize the hramone itself, they just learned how to make the synthetic harmone.
D) learning how to make a synthetic growth hormone, scientists had to remove it painstakingly - correct and only remaining answer.
E) learning how to synthesize the growth hormone, it had to be painstakingly removed by scientists - Same as C.


Right catch :)

C and D gramatically both correct, but C changes the intent.

'to make synthetic X' and 'to synthesize X' are different.
_________________

Consider kudos for the good post ... :beer
My debrief : http://gmatclub.com/forum/journey-670-to-720-q50-v36-long-85083.html

9 KUDOS received
Senior Manager
Senior Manager
avatar
Joined: 29 Jul 2009
Posts: 291
Re: Before scientists learned how to make a synthetic growth hormone, remo [#permalink]

Show Tags

New post 18 Sep 2009, 22:48
9
1
OA is C

as everybody has said, C and D are really close. That's why the question,IMO, is hard.

D) Before learning how to make a synthetic growth hormone, scientists had to remove it painstakingly in small amounts from the pituitary glands of human cadavers.

The main problem with D is that "it" refers to "synthetic growth hormone" and not only to synthetic growth hormone. Pronouns refer to the adjectives-noun. In addition, the scientist did not remove the growth hormone, so option C correctly uses the passive voice.
1 KUDOS received
SVP
SVP
avatar
Status: Graduated
Affiliations: HEC
Joined: 28 Sep 2009
Posts: 1614
Concentration: Economics, Finance
GMAT 1: 730 Q48 V44
Premium Member
Re: Before scientists learned how to make a synthetic growth hormone, remo [#permalink]

Show Tags

New post 17 Jan 2010, 10:03
1
I pick C. For D, the sentence implies that scientists extracted synthetic growth hormone, not naturally occurring growth hormone, from human bodies. This, I think, changes the meaning.

The only thing strange about C is the word "the" preceding "growth hormone." I suppose that if the sentence is referring to a specific growth hormone, then it's okay.

But isn't "scientists" plural in C? Maybe it was edited later. :)
_________________

GMAT Club Premium Membership - big benefits and savings

18 KUDOS received
Current Student
User avatar
Joined: 15 Jul 2010
Posts: 223
GMAT 1: 750 Q49 V42
Re: Before scientists learned how to make a synthetic growth hormone, remo [#permalink]

Show Tags

New post 05 Nov 2010, 02:48
18
2
C.

A. scientists learned how to make a synthetic growth hormone, removing it painstakingly
Sentence fragment. Referent of 'it' is synthetic growth hormone, when 'it' should be referring to growth hormone.

B. scientists had learned about making a synthetic growth hormone, they had to remove it painstakingly
Referent of 'it' is synthetic growth hormone, when 'it' should be referring to growth hormone.


C. scientist learned how to synthesize the growth hormone, it had to be painstakingly removed
Pronoun 'it' is sensible as it refers to the growth hormone.


D. learning how to make a synthetic growth hormone, scientists had to remove it painstakingly
Referent of 'it' is synthetic growth hormone, when 'it' should be referring to growth hormone.

E. Learning how to synthesize the growth hormone, it have to be painstakingly removed by scientists
subject-verb agreement: it have (x)

_________________

Consider KUDOS if my post was helpful. :-D

My Debrief: http://gmatclub.com/forum/750-q49v42-105591.html#p825487

4 KUDOS received
Manager
Manager
User avatar
Status: what we want to do, do it as soon as possible
Joined: 24 May 2010
Posts: 91
Location: Vietnam
WE 1: 5.0
Re: Before scientists learned how to make a synthetic growth hormone, remo [#permalink]

Show Tags

New post 21 Dec 2010, 20:59
4
3
mikeCoolBoy wrote:
Before scientists learned how to make a synthetic growth hormone, removing it painstakingly in small amounts from the pituitary glands of human cadavers.

A) scientists learned how to make a synthetic growth hormone, removing it painstakingly
B) scientists had learned about making a synthetic growth hormone, they had to remove it painstakingly.
C) scientists learned how to synthesize the growth hormone, it had to be painstakingly removed
D) learning how to make a synthetic growth hormone, scientists had to remove it painstakingly
E) learning how to synthesize the growth hormone, it had to be painstakingly removed by scientists

OA will follow


This is really a typical sc which test profound meaning. C and D are both correct in grammar but have different meanings.
D is illogical jerk because it means that: before scientists learn how to synthesize a hormone, they had to remove it (hormone) from nature (which is one of a step in the hormone synthetic process) --> so if hormone is already there, scientists dont have to synthesize it.
C is rational because it means: before scientists learn to synthesize a hormone, hormone had to be removed from nature (because people have not synthesise it yet so they have to use hormone from nature resource). --> that's the meaning of C.
this idea has come up with me when i've browsed this link, found it is very useful to read Ron's explanation.
http://www.manhattangmat.com/forums/bef ... -t637.html
_________________

Consider giving me kudos if you find my explanations helpful so i can learn how to express ideas to people more understandable.

2 KUDOS received
Intern
Intern
avatar
Joined: 03 Jul 2009
Posts: 21
Reviews Badge
Re: Before scientists learned how to make a synthetic growth hormone, remo [#permalink]

Show Tags

New post 24 Jan 2012, 23:43
2
1
IMO C, Please see POE, please feel free to pass comments

A. scientists learned how to make a synthetic growth hormone, removing it painstakingly
B. scientists had learned about making a synthetic growth hormone, they had to remove it painstakingly
C. scientists learned how to synthesize the growth hormone, it had to be painstakingly removed
D. learning how to make a synthetic growth hormone, scientists had to remove it painstakingly
E. learning how to synthesize the growth hormone, it have to be painstakingly removed by scientists

A B D -- out - Redundancy , 'make' and 'synthetic' - conveys same meaning.
Between C and E : E --out Modifier error. hence C
1 KUDOS received
Director
Director
avatar
Status: Prep started for the n-th time
Joined: 29 Aug 2010
Posts: 573
Re: Before scientists learned how to make a synthetic growth hormone, remo [#permalink]

Show Tags

New post 27 Feb 2012, 18:38
1
Agree with C.

You have to also look at "make a synthetic growth hormone" vs "synthesize the growth hormone " . You cannot make a synthetic hormone; you can only synthesize it.

Hope this helps.

Crick
Expert Post
9 KUDOS received
Retired Moderator
User avatar
P
Status: worked for Kaplan's associates, but now on my own, free and flying
Joined: 19 Feb 2007
Posts: 4340
Location: India
WE: Education (Education)
Re: Before scientists learned how to make a synthetic growth hormone, remo [#permalink]

Show Tags

New post 04 Apr 2012, 10:29
9
The chief problem in this topic is to succumb to the tempting assumption that scientists removed the natural hormone, before they could synthesize it. However, the text does not specify this. After all the text itself is a fragment with only an introductory subordinate clause but without a main clause

This is the reason that choices B, D and E fall flat, which categorically state that the scientists removed the hormone. In addition, in D, since the pronoun ‘it’ refers to ‘the synthetic growth hormone’ you have the logical question of how anyone could have removed a synthetic hormone, even before knowing how to make it or synthesize it.

C avoids the first pitfall by tactfully switching over to a passive voice, leaving the question of who removed the hormone wide open. In addition and aptly, the pronoun ‘it’ in C simply refers to a growth hormone and not a synthetic growth hormone.
_________________

you can know a lot about something and not really understand it."-- a quote
No one knows this better than a GMAT student does.
Narendran +9198845 44509

Senior Manager
Senior Manager
avatar
Joined: 22 Nov 2010
Posts: 258
Location: India
GMAT 1: 670 Q49 V33
WE: Consulting (Telecommunications)
Re: Before scientists learned how to make a synthetic growth hormone, remo [#permalink]

Show Tags

New post 21 Jun 2013, 01:07
Before scientists learned how to make a synthetic growth hormone, removing it painstakingly in small amounts from the pituitary glands of human cadavers.

A) scientists learned how to make a synthetic growth hormone, removing it painstakingly
B) scientists had learned about making a synthetic growth hormone, they had to remove it painstakingly.
C) scientists learned how to synthesize the growth hormone, it had to be painstakingly removed
D) learning how to make a synthetic growth hormone, scientists had to remove it painstakingly
E) learning how to synthesize the growth hormone, it had to be painstakingly removed by scientists Before X, Y happened. X & Y both should be clause. but , here highlighted portion is a afragment, which is not making any sense

1. Verb Seq: Before X, Y happened. Thus , we need past perfect in Y to maintain this seq. Thus, A, B are out.
2. "painstakingly" is adverb. It should modify Verb "removed". Thus , A, D are out.


_________________

YOU CAN, IF YOU THINK YOU CAN

Manager
Manager
avatar
Joined: 04 Apr 2013
Posts: 137
Re: Before scientists learned how to make a synthetic growth hormone, remo [#permalink]

Show Tags

New post 31 Oct 2013, 12:23
devinawilliam83 wrote:
Before scientists learned how to make a synthetic growth hormone, removing it painstakingly in small amounts from the pituitary glands of human cadavers.
A. scientists learned how to make a synthetic growth hormone, removing it painstakingly
B. scientists had learned about making a synthetic growth hormone, they had to remove it painstakingly
C. scientist learned how to synthesize the growth hormone, it had to be painstakingly removed
D. learning how to make a synthetic growth hormone, scientists had to remove it painstakingly
E. Learning how to synthesize the growth hormone, it have to be painstakingly removed by scientists

doesen't OA,change the meaning of the sentence? Please help



Isnt C a "Run ON"?

scientist learned how to synthesize the growth hormone - an independent statement
it had to be painstakingly removed - another independent statement

both statements are not connected with conjunctions or coordinating conjunctions etc... PLease help.
_________________

Maadhu

MGMAT1 - 540 ( Trying to improve )

1 KUDOS received
Retired Moderator
avatar
B
Joined: 23 Jul 2010
Posts: 527
GPA: 3.4
WE: General Management (Non-Profit and Government)
GMAT ToolKit User Premium Member
Re: Before scientists learned how to make a synthetic growth hormone, remo [#permalink]

Show Tags

New post 31 Oct 2013, 12:39
1
maaadhu wrote:
devinawilliam83 wrote:
Before scientists learned how to make a synthetic growth hormone, removing it painstakingly in small amounts from the pituitary glands of human cadavers.
A. scientists learned how to make a synthetic growth hormone, removing it painstakingly
B. scientists had learned about making a synthetic growth hormone, they had to remove it painstakingly
C. scientist learned how to synthesize the growth hormone, it had to be painstakingly removed
D. learning how to make a synthetic growth hormone, scientists had to remove it painstakingly
E. Learning how to synthesize the growth hormone, it have to be painstakingly removed by scientists

doesen't OA,change the meaning of the sentence? Please help



Isnt C a "Run ON"?

scientist learned how to synthesize the growth hormone - an independent statement
it had to be painstakingly removed - another independent statement

both statements are not connected with conjunctions or coordinating conjunctions etc... PLease help.


Hi maadhu,
C isn't a run on you forgot the subordinating conjunction BEFORE
Before scientist learned how to synthesize the growth hormone(subordinate/dependent clause), it had to be painstakingly removed in small amounts from the pituitary glands of human cadavers.(main/independent clause)


So the structure is {sub.conjunction +dependent clause, independent clause)

For more discussion refer link below
http://www.manhattangmat.com/forums/bef ... -t637.html
_________________

How to select your BSchool?
General Mistakes to Avoid on the GMAT
TOP 10 articles on Time Management on the GMAT
Thanks = Kudos. Kudos are appreciated

Rules for posting on the verbal forum

10 KUDOS received
Manager
Manager
User avatar
Joined: 07 May 2012
Posts: 66
Location: United States
Re: Before scientists learned how to make a synthetic growth hormone, remo [#permalink]

Show Tags

New post 11 Nov 2013, 13:17
10
5
Before scientists learned how to make a synthetic growth hormone, removing it painstakingly in small amounts from the pituitary glands of human cadavers.
The sentence is meant to say - before scientists learnt how to make synthetic growth hormones , they used to go through the painful way to extract the hormones ( growth hormones) i.e the growth hormones were removed from human cadavers

A. scientists learned how to make a synthetic growth hormone, removing it painstakingly
Sentence fragment . There is no working verb in the sentence - "before scientists learned <> , removing it <>"
the "IT" here refers to "synthetic growth hormone" , rather than "growth hormones" ( it was not the "synthetic growth hormones" that they removed from human cadavers , but was the growth hormones .


B. scientists had learned about making a synthetic growth hormone, they had to remove it painstakingly

*error in tense. The learning of making synthetic hormone , happened after they used to remove growth hormone in a painstaking way . Hence "had" in first part of sentence is incorrect.
* the "IT" in second part of the sentence refers to "synthetic growth hormone " rather than just "growth hormone" , conveying an absurd meaning that "before scientists learned to make synthetic growth hormone , they used to remove synthetic growth hormone from pituitary glands".


C. scientists learned how to synthesize the growth hormone, it had to be painstakingly removed
CORRECT : the "IT" here refers to "growth hormone" , hence conveying a correct meaning.Sentence is framed in a proper Tense.

D. learning how to make a synthetic growth hormone, scientists had to remove it painstakingly
Same issue with "IT" as in A and B.

E. learning how to synthesize the growth hormone, it have to be painstakingly removed by scientists

*Modifier error- doesn't convey who is synthesizing the growth hormone ( comma should immediately follow with the noun scientist . Which is not the case here).
Tense error - messes up the tense issue ( should be "had" instead of "have" , since this action is not happening anymore now and this happened before the scientists learned to synthesize).


-Jyothi
_________________

Jyothi hosamani

2 KUDOS received
Senior Manager
Senior Manager
User avatar
Joined: 03 Dec 2012
Posts: 293
Re: Before scientists learned how to make a synthetic growth hormone, remo [#permalink]

Show Tags

New post 02 Dec 2013, 23:38
2
ayushman wrote:
mohnish104 wrote:
C is not ambiguous. :yikes Its perfect. If anything, I was confused between C & D before realizing that D had redundancy issues. Hence C. :teleport

Can you please explain what redundancy issues does D have. I am not able to figure this out.[/q J

Just as you don't use the words annual and year in the same sentence because they mean the same thing, you don't use make and synthesize in the same sentence because they mean the same thing. Synthetic also means artificial/unnatural/man made. You don't make something natural, you find something natural.


Hope it helps.
2 KUDOS received
Manager
Manager
avatar
Joined: 27 Jul 2012
Posts: 122
Re: Before scientists learned how to make a synthetic growth hormone, remo [#permalink]

Show Tags

New post 10 May 2014, 11:27
2
Before scientists learned how to make a synthetic growth hormone, removing it painstakingly in small amounts
from the pituitary glands of human cadavers.

1:meaning analysis
before scientists learned how to make a synthetic growth hormone, they had to remove the growth hormone painstakingly in small amounts from its place.

2:error analysis
sentence fragment. dependent clause+,+ phrase

3:POE
A.
B. scientists had learned about making a synthetic growth hormone, they had to remove it painstakingly
in fact the second sentence's verb must be stated in past participle from + it in the second part refers to a synthetic growth hormone while it should refer to growth hormone

C. scientists learned how to synthesize the growth hormone, it had to be painstakingly removed


D. learning how to make a synthetic growth hormone, scientists had to remove it painstakingly
changes meaning. it implies that before learning how to do x they had to do y+ pronoun reference error "it" refers to a synthetic growth hormone while it should refer to growth hormone

E. learning how to synthesize the growth hormone, it had to be painstakingly removed by scientists
modifier error+ no need for the passive form
Manager
Manager
avatar
Joined: 04 Feb 2013
Posts: 115
Re: Before scientists learned how to make a synthetic growth hormone, remo [#permalink]

Show Tags

New post 10 May 2014, 22:37
Bibinaz wrote:
Before scientists learned how to make a synthetic growth hormone, removing it painstakingly in small amounts
from the pituitary glands of human cadavers.

1:meaning analysis
before scientists learned how to make a synthetic growth hormone, they had to remove the growth hormone painstakingly in small amounts from its place.

2:error analysis
sentence fragment. dependent clause+,+ phrase

3:POE
A.
B. scientists had learned about making a synthetic growth hormone, they had to remove it painstakingly
in fact the second sentence's verb must be stated in past participle from + it in the second part refers to a synthetic growth hormone while it should refer to growth hormone

C. scientists learned how to synthesize the growth hormone, it had to be painstakingly removed


D. learning how to make a synthetic growth hormone, scientists had to remove it painstakingly
changes meaning. it implies that before learning how to do x they had to do y+ pronoun reference error "it" refers to a synthetic growth hormone while it should refer to growth hormone

E. learning how to synthesize the growth hormone, it had to be painstakingly removed by scientists
modifier error+ no need for the passive form


Thanks for the explanation..
Just to understand..Can u plz help us to explain more on "in fact the second sentence's verb must be stated in past participle from" ?

Cheers
1 KUDOS received
Manager
Manager
avatar
Joined: 27 Jul 2012
Posts: 122
Re: Before scientists learned how to make a synthetic growth hormone, remo [#permalink]

Show Tags

New post 11 May 2014, 06:33
1
addict1ve wrote:
Bibinaz wrote:
Before scientists learned how to make a synthetic growth hormone, removing it painstakingly in small amounts
from the pituitary glands of human cadavers.

1:meaning analysis
before scientists learned how to make a synthetic growth hormone, they had to remove the growth hormone painstakingly in small amounts from its place.

2:error analysis
sentence fragment. dependent clause+,+ phrase

3:POE
A.
B. scientists had learned about making a synthetic growth hormone, they had to remove it painstakingly
in fact the second sentence's verb must be stated in past participle from + it in the second part refers to a synthetic growth hormone while it should refer to growth hormone

C. scientists learned how to synthesize the growth hormone, it had to be painstakingly removed


D. learning how to make a synthetic growth hormone, scientists had to remove it painstakingly
changes meaning. it implies that before learning how to do x they had to do y+ pronoun reference error "it" refers to a synthetic growth hormone while it should refer to growth hormone

E. learning how to synthesize the growth hormone, it had to be painstakingly removed by scientists
modifier error+ no need for the passive form


Thanks for the explanation..
Just to understand..Can u plz help us to explain more on "in fact the second sentence's verb must be stated in past participle from" ?

Cheers



addict1ve thanks for your Kudos,

we use past perfect form when verb sequencing is present. it means two actions took place in the past, and one of these actions happened earlier than the second one+ these two actions are related.

for example: his wife divorced him because he had had an affair. "had had affair" is the earlier action and "divorced" is the later action.

here by "in fact the second sentence's verb must be stated in past participle form" I meant if we want to use past participle verb form, we should use it for the earlier action. the earlier action here is removing the growth hormone painstakingly, and the action of learning is the later action.
so for sure the usage of past participle form of the verb for earlier action in choice B is incorrect.

however, by your question I've remembered three important points:
1- we use past perfect from for two actions that are related.
2- both actions should be in the past tense
3- if time marker is present in the sentence, using past perfect is not necessary. ( under this condition if the earlier action expressed in simple past then the sentence is not incorrect)

hope it helps.
1 KUDOS received
Manager
Manager
User avatar
Joined: 10 Sep 2014
Posts: 68
Re: Before scientists learned how to make a synthetic growth hormone, remo [#permalink]

Show Tags

New post 12 Dec 2014, 02:38
1
Great question.

There is a meaning difference between c & d.

C. scientists learned how to synthesize the growth hormone, it had to be painstakingly removed => This means scientists had to remove the growth hormone from the glands
D. learning how to make a synthetic growth hormone, scientists had to remove it painstakingly => There is a meaning issue here. scientists were trying to remove the growth hormone, not the synthetic growth hormone. C corrects this meaning issue. Let me know if that makes sense.
_________________

Press KUDOs if you find my explanation helpful

Manager
Manager
avatar
Joined: 24 Jul 2011
Posts: 207
Location: India
GMAT 1: 570 Q50 V19
GMAT 2: 650 Q49 V28
GMAT 3: 690 Q50 V34
WE: Information Technology (Investment Banking)
GMAT ToolKit User Reviews Badge
Re: Before scientists learned how to make a synthetic growth hormone, remo [#permalink]

Show Tags

New post Updated on: 16 Sep 2015, 10:49
1
In A, as you said, it can refer back to "synthetic growth hormone" but it is a pronoun and so it can refer back only to noun, which is growth hormone in this case. Over here "synthetic" is working like an adjective so "it" should not refer back to "synthetic growth hormone". Just my understanding, I might be wrong.

Experts can you please guide.


gmacforjyoab wrote:
Before scientists learned how to make a synthetic growth hormone, removing it painstakingly in small amounts from the pituitary glands of human cadavers.
The sentence is meant to say - before scientists learnt how to make synthetic growth hormones , they used to go through the painful way to extract the hormones ( growth hormones) i.e the growth hormones were removed from human cadavers

A. scientists learned how to make a synthetic growth hormone, removing it painstakingly
Sentence fragment . There is no working verb in the sentence - "before scientists learned <> , removing it <>"
the "IT" here refers to "synthetic growth hormone" , rather than "growth hormones" ( it was not the "synthetic growth hormones" that they removed from human cadavers , but was the growth hormones .


B. scientists had learned about making a synthetic growth hormone, they had to remove it painstakingly

*error in tense. The learning of making synthetic hormone , happened after they used to remove growth hormone in a painstaking way . Hence "had" in first part of sentence is incorrect.
* the "IT" in second part of the sentence refers to "synthetic growth hormone " rather than just "growth hormone" , conveying an absurd meaning that "before scientists learned to make synthetic growth hormone , they used to remove synthetic growth hormone from pituitary glands".


C. scientists learned how to synthesize the growth hormone, it had to be painstakingly removed
CORRECT : the "IT" here refers to "growth hormone" , hence conveying a correct meaning.Sentence is framed in a proper Tense.

D. learning how to make a synthetic growth hormone, scientists had to remove it painstakingly
Same issue with "IT" as in A and B.

E. learning how to synthesize the growth hormone, it have to be painstakingly removed by scientists

*Modifier error- doesn't convey who is synthesizing the growth hormone ( comma should immediately follow with the noun scientist . Which is not the case here).
Tense error - messes up the tense issue ( should be "had" instead of "have" , since this action is not happening anymore now and this happened before the scientists learned to synthesize).


-Jyothi

_________________

Middle of nowhere!


Originally posted by rohitmanglik on 13 Sep 2015, 08:01.
Last edited by rohitmanglik on 16 Sep 2015, 10:49, edited 1 time in total.
Re: Before scientists learned how to make a synthetic growth hormone, remo   [#permalink] 13 Sep 2015, 08:01

Go to page    1   2    Next  [ 27 posts ] 

Display posts from previous: Sort by

Before scientists learned how to make a synthetic growth hormone, remo

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.