AAMC Exam Question-Biochemistry

[pinkprincess246]

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I do not understand how they deduced that serine was the answer here. Many other amino acids could also be phosphorylated..

 

[kwu]

Yes, there are a couple of amino acids that can be phosphorylated. But I think it's hard to answer the question without knowing the context of the passage. The passage may give more indicators to why the answer was serine.

 

[beOncogene]

I do not understand how they deduced that serine was the answer here. Many other amino acids could also be phosphorylated..

Only three amino acids could be phosphorylated. Those include serine, threonine, and tyrosine since they contain side chains with a hydroxyl group. I am sure the answer choices will consist only 1 of those amino acids . Otherwise, a structure should be given or some kind of clues.

 

[aldol16]

I do not understand how they deduced that serine was the answer here. Many other amino acids could also be phosphorylated..

It looks like you chose Ala for an answer. Ala cannot be phosphorylated. Where did you envision it being phosphorylated? I think the answer to that question will reveal the root of your confusion.

 

[aldol16]

Only three amino acids could be phosphorylated. Those include serine, threonine, and tyrosine since they contain side chains with a hydroxyl group. I am sure the answer choices will consist only 1 of those amino acids . Otherwise, a structure should be given or some kind of clues.

His, Lys, and Arg can also be phosphorylated although this is uncommon and you will not be expected to know that. The answer choices will likely be pretty distinct.