Incorrect Question on DATQVault

[2PacClone23]

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Unless I'm not reading the question/amino acid table in an incorrect manner, why is the answer only C?


Huntington's disease is believed to be correlated with an abnormal polyglutamine stretch of amino acids in the huntingtin protein. What triplet is likely repeated in the protein coding region of the mRNA responsible for producing the huntingtin protein? (Use exhibit as necessary.)

A.UUU.
B.CCG.
C.CAA.
D. [Correct] CAG.
E.GGA.


Answer C also codes for Glu.


The answer explanation is "A CAG triplet is repeated abundantly in the protein coding region of the mRNA responsible for producing the huntingtin protein. This problem is indirectly asking the following question: Which triplet (codon) codes for the amino acid glutamine? Since the question states that a lengthy stretch of glutamines reside in the amino acid sequence of the protein that is correlated with Huntington's disease, it reasonable to assume that CAG is abundantly repeated in the sequence from which the protein is derived."

 

[Demps]

Unless I'm not reading the question/amino acid table in an incorrect manner, why is the answer only C?


Huntington's disease is believed to be correlated with an abnormal polyglutamine stretch of amino acids in the huntingtin protein. What triplet is likely repeated in the protein coding region of the mRNA responsible for producing the huntingtin protein? (Use exhibit as necessary.)

A.UUU.
B.CCG.
C.CAA.
D. [Correct] CAG.
E.GGA.


Answer C also codes for Glu.


The answer explanation is "A CAG triplet is repeated abundantly in the protein coding region of the mRNA responsible for producing the huntingtin protein. This problem is indirectly asking the following question: Which triplet (codon) codes for the amino acid glutamine? Since the question states that a lengthy stretch of glutamines reside in the amino acid sequence of the protein that is correlated with Huntington's disease, it reasonable to assume that CAG is abundantly repeated in the sequence from which the protein is derived."

I think you're right. I ran into this one too. I'm sure there are two answers to this.

 

[IronJeff]

I found several errors in datQvault (8-9 over the 10 tests). It's really interesting because you usually see in the statistics of the test that several people got a score of 38 or 39, but NO ONE got a score of 40. This is because all the people who should have gotten 40/40 got the incorrectly graded question wrong. It's silly that these errors occur in paid test prep materials. But overall, I really liked datQvault, and would recommend it.

 

[journeybegins]

The answer for that question is indeed D.

I took a human disease class, and when we learned about Huntington's Disease, it is due to a repeat of CAG (polyglutamine) in the HD gene that causes misfolding of the Huntington protein, which leads to inclusions to accumulate in the neurons in the basal ganglia.


I don't think this question is trying to ask you if you can read the AA/protein chart. It it asking you to recall the basis behind a disease, knowing that it's a repeat of CAG. Like some other diseases, which have DIFFERENT repeats.

I realllllllllly...hope these details don't really show up the DAT. 😕

 

[jwnichols21]

I found several errors in datQvault (8-9 over the 10 tests). It's really interesting because you usually see in the statistics of the test that several people got a score of 38 or 39, but NO ONE got a score of 40. This is because all the people who should have gotten 40/40 got the incorrectly graded question wrong. It's silly that these errors occur in paid test prep materials. But overall, I really liked datQvault, and would recommend it.

Would you mind posting the errors that you found? Would like to note these as I go through them. Thanks!

Edit: In going over the Plant exhibit, which is amazing btw, found an error: Seedless Tracheophytes are dominantly homosporous, not heterosporous.