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# Before scientist learned how to make a synthetic growth

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Manager
Joined: 14 Nov 2005
Posts: 65
Before scientist learned how to make a synthetic growth [#permalink]

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25 May 2006, 11:54
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Before scientist 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 had to be painstakingly removed by scientists

Director
Joined: 27 Feb 2006
Posts: 622

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25 May 2006, 13:37
^ D ^

a. where is the verb ??

b. "before scientists had learned"

c. "how to synthesize the growth hormone" ---> changes the original verb, and there is passive

e. redundant: "Scientists ... by scientists.."
VP
Joined: 07 Nov 2005
Posts: 1118
Location: India

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25 May 2006, 19:24
Agree with D.
C changes the meaning of the original sentence.
Senior Manager
Joined: 07 Mar 2006
Posts: 352

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25 May 2006, 20:44
Can't decide b/w C and D.
Manager
Joined: 19 Apr 2006
Posts: 231

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25 May 2006, 20:51
one thing that I was confused was the subject 'scientist' or 'scientists'

can some explain this... one different between C and D...

thanks
Manager
Joined: 03 May 2006
Posts: 51

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25 May 2006, 21:00
Between C and D

C says "learned to synthesize the growth hormone"

D says "learning to make a synthetic growth hormone"

I opt for C as it is concise and As Professor rightly said sequence of tenses.
SVP
Joined: 30 Mar 2006
Posts: 1728

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25 May 2006, 21:09
Will go with C.
A/B/D all have the same problem. â€œitâ€
Director
Joined: 17 Sep 2005
Posts: 903

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25 May 2006, 21:45
It should be C.

Before scientist learned how to synthesize the growth hormone, it had to be painstakingly removed in small amounts from the pituitary glands of human cadavers.

In C 'it' cleary refers to 'growth harmone' and tense usage is also correct.

In D 'it' refers to 'synthetic growth hormone' rather than 'growth harmone'.

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.

Scientist can remove 'growth hormone' and not' synthetic growth hormone' from the pituitary glands of human cadavers.

So IMO answer should be C.

Regards,
Brajesh
VP
Joined: 21 Sep 2003
Posts: 1057
Location: USA

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25 May 2006, 22:30
Agree with Brajesh's explanation. C should be it.

Is the questions correct? C should probably have "scientists"
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Joined: 07 Jul 2004
Posts: 5043
Location: Singapore

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25 May 2006, 22:46
A,B --> out. awkward sentences
D,E --> progrssive 'learning' not appropriate

C is the best chioce
Manager
Joined: 22 May 2005
Posts: 138

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26 May 2006, 01:51
Another one for "C" .. rightly said ..sequence of tenses makes the choice C correct ...what's the OA BTW???
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Director
Joined: 27 Feb 2006
Posts: 622

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26 May 2006, 02:21
b14kumar wrote:
It should be C.

In D 'it' refers to 'synthetic growth hormone' rather than 'growth harmone'.

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.

Scientist can remove 'growth hormone' and not' synthetic growth hormone' from the pituitary glands of human cadavers.

Regards,
Brajesh

That's what I have missed That's true ! It should be ^ C ^

Manager
Joined: 10 May 2006
Posts: 125
Re: SC - Growth Hormone [#permalink]

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26 May 2006, 13:55
ffgmat wrote:
Before scientist 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 had to be painstakingly removed by scientists

It's "C". When two actions occur in the past, the first action has to be in past perfect and the latter action has to be in past tense. Only "C" follows the convention.

"D" and "E" are in passive voice and so "C" is the clear winner, and I am overlooking other faults with "D" and "E".
Re: SC - Growth Hormone   [#permalink] 26 May 2006, 13:55
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# Before scientist learned how to make a synthetic growth

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