Metabolism — Flashcards

Flashcard 901: Vitamin _____ is also referred to as phytomenadione, phylloquinone, and phytonadione

Answer: K

Flashcard 902: Collagen Synthesis: Hydroxylation of selected prolines and lysines during collagen synthesis requires vitamin _____

Answer: C

Flashcard 903: Vitamin B12 deficiency is characterized by _____ serum methylmalonic acid

Answer: increased

Flashcard 904: Vitamin D2 is obtained via _____.

Answer: plants

Flashcard 905: Does Dubin-Johnson syndrome result in unconjugated or conjugated hyperbilirubinemia? _____

Answer: Conjugated

Flashcard 906: Purine de novo synthesis begins with _____

Answer: ribose-5-phosphate

Extra: Ribose-5-phosphate (derived from the HMP shunt) is converted to PRPP (phosphoribosyl pyrophosphate) by PRPP synthetase. PRPP then serves as the sugar-phosphate foundation for de novo purine synthesis.

Flashcard 907: Carbamoyl phosphate synthetase II is regulated by negative feedback via _____

Answer: UTP

Flashcard 908: Which Krebs' cycle enzyme requires the same 5 cofactors as pyruvate dehydrogenase (TLCFN)? _____

Answer: Alpha-ketoglutarate dehydrogenase

Flashcard 909: What is the inheritance of hereditary fructose intolerance? _____

Answer: Autosomal recessive

Flashcard 910: Patients with _____ have decreased reabsorption of cystine, ornithine, lysine, and arginine

Answer: cystinuria