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Manager
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pls see attached [#permalink] New post 05 Dec 2005, 11:01
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A
B
C
D
E

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Manager
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Re: CR [#permalink] New post 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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 [#permalink] New post 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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 [#permalink] New post 05 Dec 2005, 23:07
imaru, what's OA for this.
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 [#permalink] New post 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 :devil

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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 [#permalink] New post 06 Dec 2005, 04:14
the OA is B
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 [#permalink] New post 06 Dec 2005, 04:14
the OA is B
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 [#permalink] New post 06 Dec 2005, 09:26
Got B.
  [#permalink] 06 Dec 2005, 09:26
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