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# During the process of photosynthesis, some of the light energy absorbe

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Senior Manager
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During the process of photosynthesis, some of the light energy absorbe  [#permalink]

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29 Jun 2014, 03:14
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52% (01:34) correct 48% (01:44) wrong based on 299 sessions

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During the process of photosynthesis, some of the light energy absorbed by chlorophylls is stored in the form of adenosine triphosphate (ATP); the rest is used for the removal of the electrons in water, to then be used in the reactions that turn carbon dioxide into organic compounds.

A) to then be used in the reactions that turn carbon dioxide into organic compounds

B) which are then used in the reactions that turn carbon dioxide into organic compounds

C) which are then used in the reactions, turning carbon dioxide into organic compounds

D) then used in the reactions that turn carbon dioxide into organic compounds

E) which the reactions that turn carbon dioxide into organic compounds then use
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Re: During the process of photosynthesis, some of the light energy absorbe  [#permalink]

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29 Jun 2014, 03:34
dude can you provide me the official explanation???, please;

if you do not mind
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Re: During the process of photosynthesis, some of the light energy absorbe  [#permalink]

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29 Jun 2014, 04:47
During the process of photosynthesis, some of the light energy absorbed by chlorophylls is stored in the form of adenosine triphosphate (ATP); the rest is used for the removal of the electrons in water, to then be used in the reactions that turn carbon dioxide into organic compounds.

A) to then be used in the reactions that turn carbon dioxide into organic compounds
B) which are then used in the reactions that turn carbon dioxide into organic compounds
C) which are then used in the reactions, turning carbon dioxide into organic compounds
D) then used in the reactions that turn carbon dioxide into organic compounds
E) which the reactions that turn carbon dioxide into organic compounds then use

A, D can be eliminated. "electrons in water" after this a modifier is reqd "Which" is the correct modifier in this case.

E: awkward construction

Between B and C, B has correct construction. gerund is not required as shown in C.

Thanks
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Re: During the process of photosynthesis, some of the light energy absorbe  [#permalink]

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29 Jun 2014, 12:03
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goodyear2013 wrote:
During the process of photosynthesis, some of the light energy absorbed by chlorophylls is stored in the form of adenosine triphosphate (ATP); the rest is used for the removal of the electrons in water, to then be used in the reactions that turn carbon dioxide into organic compounds.
A) to then be used in the reactions that turn carbon dioxide into organic compounds
B) which are then used in the reactions that turn carbon dioxide into organic compounds
C) which are then used in the reactions, turning carbon dioxide into organic compounds
D) then used in the reactions that turn carbon dioxide into organic compounds
E) which the reactions that turn carbon dioxide into organic compounds then use

Can you plz explain .. How can B or C come into consideration ? The word 'which' clearly refers to water...how can that be plural though... the idea is that 'which' refers to 'electrons' here .. but is not that ambiguous ? All the while we talked about 'light energy' .. where exactly does the context switch to 'electrons' ?
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Re: During the process of photosynthesis, some of the light energy absorbe  [#permalink]

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29 Jun 2014, 13:32
1
ani781 wrote:
goodyear2013 wrote:
During the process of photosynthesis, some of the light energy absorbed by chlorophylls is stored in the form of adenosine triphosphate (ATP); the rest is used for the removal of the electrons in water, to then be used in the reactions that turn carbon dioxide into organic compounds.
A) to then be used in the reactions that turn carbon dioxide into organic compounds
B) which are then used in the reactions that turn carbon dioxide into organic compounds
C) which are then used in the reactions, turning carbon dioxide into organic compounds
D) then used in the reactions that turn carbon dioxide into organic compounds
E) which the reactions that turn carbon dioxide into organic compounds then use

Can you plz explain .. How can B or C come into consideration ? The word 'which' clearly refers to water...how can that be plural though... the idea is that 'which' refers to 'electrons' here .. but is not that ambiguous ? All the while we talked about 'light energy' .. where exactly does the context switch to 'electrons' ?

Hello Ani..!
gud question..

in case of words such as that,which..they can modify slightly far away words that eventually makes sense ...its a rule discussed on many forums on gmatclub..
heres one classic example -

the box of nails,that is on the counter, is to be used on this project.

its a correct sentence as 'is' represents singular noun which can only be a box here..

the logic more or less depends upon whether the noun it logically refers to is singular or plural..

for more details on this,u can visit article from magoosh..

http://magoosh.com/gmat/2013/modifiers- ... orrection/

Ur Q.2-
Here, some part of light is used for x puropose and rest of the part is used for other purpose..so light cannot be used further...here,water also does not makes sense with the further sentence as water here is singular..only plural word electrons makes sense to be used further and provides us subject-verb agreement..

hope it helps

KUDOS really motivate to share the learning brother
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Re: During the process of photosynthesis, some of the light energy absorbe  [#permalink]

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30 Jun 2014, 03:14
Hi,

After a preposition e.g. 'Of', always comes a noun. Here the noun is 'The electrons in water'. Electrons are plural hence plural verb has been used.

Regards,
Ashish
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Re: During the process of photosynthesis, some of the light energy absorbe  [#permalink]

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30 Jun 2014, 04:24
Electrons in water, which . ......
In water is a modifier for electrons.
So the use of which should refer to the noun of that modifier. In this case, that noun is electrons.

Hence B

Posted from GMAT ToolKit
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Re: During the process of photosynthesis, some of the light energy absorbe  [#permalink]

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30 Jun 2014, 04:46
Hi
can somebody please explain why gerund cannot be used here?

Regards
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Re: During the process of photosynthesis, some of the light energy absorbe  [#permalink]

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05 Jul 2014, 01:50
Hi
can somebody please explain why gerund cannot be used here?

Regards

Here's the Official Answer from The Economist:

"This answer choice corrects the ambiguity in the original question by using a relative clause (which are then used) instead of the non-conjugated form to be used, making it clear that electrons are used in the chemical process.

The corrected sentence also makes the sequence clear: first the electrons in water are removed and then used in the chemical reaction.

Note that in this construction, the complex noun phrase electrons in water is plural (similar to x of y subject), and is correctly modified by the relative clause which are then used, which uses a plural verb (are)."

Meaning: The water is filled with electrons, which are then used in the chemical reaction.
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Re: During the process of photosynthesis, some of the light energy absorbe  [#permalink]

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15 Oct 2015, 19:24
goodyear2013 wrote:
During the process of photosynthesis, some of the light energy absorbed by chlorophylls is stored in the form of adenosine triphosphate (ATP); the rest is used for the removal of the electrons in water, to then be used in the reactions that turn carbon dioxide into organic compounds.
A) to then be used in the reactions that turn carbon dioxide into organic compounds
B) which are then used in the reactions that turn carbon dioxide into organic compounds
C) which are then used in the reactions, turning carbon dioxide into organic compounds
D) then used in the reactions that turn carbon dioxide into organic compounds
E) which the reactions that turn carbon dioxide into organic compounds then use

Correct me if I'm wrong. This is my reasoning.

1) to then be used in the reactions that turn carbon dioxide into organic compounds -> I think it is ambiguous. The light energy is used in the reactions or the electrons in water are used in the reactions.

2) which are then used in the reactions that turn carbon dioxide into organic compounds -> The use of which makes this choice clear and concise.

3) which are then used in the reactions, turning carbon dioxide into organic compounds -> Although "which" is clear, "turning" is not correct. It means that while electrons in water are used in the reactions, carbon dioxide is turning into organic compounds. It doesn't make sense.

4) then used in the reactions that turn carbon dioxide into organic compounds -> same error as in A

5) which the reactions that turn carbon dioxide into organic compounds then use -> completely grammatically wrong
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Re: During the process of photosynthesis, some of the light energy absorbe  [#permalink]

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15 Oct 2015, 20:08
because sc tests meaning, if the meaning is the knowlege new to us, we have hard sc.

suppose, we read choice B in a newspaper, I bet most of us, except the persons from this relevant field, can not understand choice B. now the situation is harder, B is posed besides the distorted meanings and we have to find out B.

very hard because we do not have knowlege of photosysthesis. this question is favorable to person in photosynthesis field and I consider this question is specialized test .
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Re: During the process of photosynthesis, some of the light energy absorbe  [#permalink]

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15 Oct 2015, 22:24
How would someone with no knowledge of photosynthesis know whether light energy is used in the reaction or electrons?
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Re: During the process of photosynthesis, some of the light energy absorbe  [#permalink]

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04 Sep 2018, 02:21
How would someone with no knowledge of photosynthesis know whether light energy is used in the reaction or electrons?
How likely such a specialization specific question to appear in GMAT?
Re: During the process of photosynthesis, some of the light energy absorbe   [#permalink] 04 Sep 2018, 02:21
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