A 28-Year-Old Woman Comes to the Physician Because She Has

A 28-year-old woman comes to the physician because she has had intermittent episodes of headache, nausea, abdominal pain, and tingling of her fingers. She also complains of dark urine during the episodes. Her mother and maternal uncle have similar symptoms and her father is healthy. Laboratory tests show normal liver function tests. Intravenous dextrose is administered and her symptoms improve significantly.  Dextrose infusion most likely improved this patient's condition by affecting which of the following pathways?

A) Gluconeogenesis
B) Fatty acid synthesis
C) Ketone body formation
D) Porphyrin synthesis
E) Protein catabolism
F) Purine degradation

Correct Answer:

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