pls see attached : GMAT Critical Reasoning (CR)
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Manager
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pls see attached [#permalink]

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05 Dec 2005, 11:01
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Manager
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Re: CR [#permalink]

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05 Dec 2005, 11:12
B.

During sleep ---> number of cells bound decreases.

When awake ---> cells bound increases.

When coffee interupts binding and hence keeps you wake it should disrupt binding. Correct.
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05 Dec 2005, 11:25
Not sure but A is my pick.

premise:
sleep -> number of sites bound decreases
hypothesis -> cululative binding of adenosine to large number of sites causes sleep

A:
sleep -> lowest adnosine -> but number of brain cells bound with adenosine large

if during sleep:
- number of sites bound decreases and
- number of brain cells bound with adenosine large

cumulative binding to adenosine may be causing sleep.
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05 Dec 2005, 23:07
imaru, what's OA for this.
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05 Dec 2005, 23:14
duttsit wrote:
Not sure but A is my pick.

premise:
sleep -> number of sites bound decreases
hypothesis -> cululative binding of adenosine to large number of sites causes sleep

A:
sleep -> lowest adnosine -> but number of brain cells bound with adenosine large

if during sleep:
- number of sites bound decreases and
- number of brain cells bound with adenosine large

cumulative binding to adenosine may be causing sleep.

A seems to weaken the researcher`s hypothesis. It would only be the case if the researchers were analyzing hibernation in bears or vampires that sleep for hundreds of years

Coffee does an amazing thing. It stops adenicine from binding to the cells so we can stay awake all night long cramming for our GMAT.

Straight (B)
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06 Dec 2005, 04:14
the OA is B
Manager
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06 Dec 2005, 04:14
the OA is B
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06 Dec 2005, 09:26
Got B.
06 Dec 2005, 09:26
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