WBR0887

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Author [[PageAuthor::Rim Halaby, M.D. [1]]]
Exam Type ExamType::USMLE Step 1
Main Category MainCategory::Biochemistry
Sub Category SubCategory::General Principles
Prompt [[Prompt::A 28 year old woman recently found to have a positive PPD was started on INH prophylaxis. Six months later, the patient returns to the infectious disease clinic with a small wound on the sole of her foot. She claims she does not remember how she got the wound, and explains that she feels like she has been losing feeling in her feet. She reports having difficulty walking and often losing her shoes without even noticing a difference. She also reports feeling tired and extremely irritable recently. Serum levels of which of the following would you expect to be decreased in this patient?]]
Answer A AnswerA::Methionine
Answer A Explanation AnswerAExp::
Answer B AnswerB::Homocysteine
Answer B Explanation AnswerBExp::
Answer C AnswerC::Cysteine
Answer C Explanation AnswerCExp::
Answer D AnswerD::Succinyl-CoA
Answer D Explanation AnswerDExp::
Answer E AnswerE::Methylmalonyl-CoA
Answer E Explanation AnswerEExp::
Right Answer RightAnswer::C
Explanation [[Explanation::

Educational Objective:
References: ]]

Approved Approved::No
Keyword WBRKeyword::Izoniazid, WBRKeyword::Vitamin B6, WBRKeyword::Pyridoxine
Linked Question Linked::
Order in Linked Questions LinkedOrder::