2009 ADA #14 in SNS

[virajpatel]

I don't get why the answer is bicarbonate buffer. I though bicarbonate what the primary extracellular buffer and phosphate is the intracellular buffer?

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[virajpatel]

I have no idea how to even get to this answer.

 

[tooth knockn]

D ?

 

[baywatch123]

i would've chosen A, because of that -O-C-N bond still present in the product. I know D would have it also, but I feel like the methoxide (CH3OH) would somehow attack the benzene group, with -OCH3 as the "leaving" group

i could be totally wrong though, this question looks weird

 

[emminent]

I have no idea how to even get to this answer.

What's the answer for it?

 

[ekam]

I guess its D

 

[virajpatel]

Its actually C.

 

[virajpatel]

What about number 14 which asks which is the primary intracellular buffer?

 

[tooth knockn]

Its actually C.

Ouch

 

[baywatch123]

Its actually C.

?? explain please

 

[virajpatel]

Lol I don't know how thats why I came here.

 

[baywatch123]

you think this type of question will be on the exam :S the Br's that suddenly appear on the product is odd...

 

[virajpatel]

There are so many errors on the 2009 DAT. Its outrageous

 

[kerfufle]

It's an error, don't stress.

 

[tooth knockn]

Is the 2007 dat sample good for study/ mock test?

 

[kerfufle]

Is the 2007 dat sample good for study/ mock test?

I think it's a little too easy but the scores are obviously adjusted so it's still somewhat representative..

 

[tooth knockn]

Has anyone who took the DAT, think that the 2007 dat sample is too easy?

 

[dhk2131]

It's comparatively easier, but not by a whole lot. I think I got a 21 on Bio, 24 on GC, and 30 on OC (OC was noticeably easier on 2007). I actually ended up doing better on the actual DAT than on the 2007/2009 exam, although the 2009 is pretty similar in difficulty (but then again, I took the 2007 ~2 weeks before my exam so I learned a whole bunch in those weeks).

 

[dhk2131]

The 2009 DAT's PAT is easier (I got a 82/90 on it, which is outrageous for me). The RC is about the same if not a bit harder on the 2009. The QR is harder on the 2009 than on the actual (2007 is a better indicator... but the real QR is possibly between the 2007 and 2009 exams regarding difficulty).

 

[tooth knockn]

Hmmmmm

 

[tooth knockn]

dhk2131

Thank you.

Very clear.