2009 ADA DAT - The horror...the horror...

[ushaseos]

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EDIT: The preface is there in case people want to know where I got this test. Last week I was in a bit of a panic since I couldn't get the test in time if I ordered from ADA and the online version is useless since it doesn't let you check your mistakes or even look at the test a second time.

I was lucky enough to procure a 2009 ADA test from a member on SDN and I did it last week on Tuesday. I just checked where I made mistakes today since my test is on Monday and I saw some terrible mistakes in the sciences. I never checked since I felt my scores were decent...but boy that was stupid!

Scores on Sciences not adjusting for ADA's mistakes:

Bio / GC / OC - 21/22/19

Adjusted for mistakes:

Bio/ GC /OC - 22/22/22

Did I just get like a bad version of the test? Am I just ******ed and losing my mind? Or are these just terrible mistakes that the ADA should be ashamed of?


Bio Question 1:

http://imageshack.us/photo/my-images/259/bio1j.jpg/

My Answer: A Correct Answer: C

Plasma Cells are matured B cells (or at least in some way related to B-lymphocytes). They are the mass producers of antibodies. Cytotoxic T-Cells have NOTHING to do with humoral immunity, in fact T-Cells in general have nothing to do with humoral immunity.

Bio Question 2:

http://imageshack.us/photo/my-images/687/bio2y.jpg/

My answer: C, Correct Answer E

A is wrong because Lowering Eact doesn't address the negative delta S issue. B is nonsense. E is nonsense because Energy cannot be created and destroyed. D doesn't address the issue either. C is the only one that takes the non-spontaneous nature of lowering delta S of a system and couples it with an external energy source.

OChem Question 1:

http://imageshack.us/photo/my-images/710/ochem1.jpg/

My Answer: C Correct Answer: B

I altered the image so pardon the transgression. The question basically asks how many types of Hs are there in naphthalene. I color-coded them. Since this is mono bromination, all identical H's count as 1 possible site.

Ochem Question 2:

http://imageshack.us/photo/my-images/59/ochem2.jpg/

My Answer: A, Correct Answer: D

Maybe the C7H12 was a typo in the question, but clearly the product shown is a ketone on end and and aldehyde on the other. Ozonolysis breaks the C=C and makes two C=O. The only answer choice capable of making an aldehyde and ketone is A Since breaking the C=C in all the other choices makes either 2 Aldehydes or 2 Ketones or more than 2 C=O groups

OChem Question 3:

http://imageshack.us/photo/my-images/849/ochem3.jpg/

My Answer: A, Correct Answer: D

These molecules have the same chemical formula (you don't have to count, just go off degree of unsaturation since one has a Double bond and a ring and the other one has two rings). Molecule 2 can only be made from 1 if I broke a couple bonds and made them elsewhere. This is the definition of Constitutional Isomers.

 

[Chrono]

hmmm...I just checked my written sample test (ADA 2009) and it has different questions. For example, the first bio question is about fungi processes. I got this months ago...I wonder if they revised the paid written test recently?

ushaseos - PM me if you'd like to compare my version and your version, we can do a quick voice chat on skype.

 

[ushaseos]

I can if you'd like but I just finished the DAT and am pretty sure I won't take it again. I actually did the OAT test and that one had a bunch of typos too, looks like ADA loves to churn out crappy practice tests.