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Multiple Choice Questions

A 56-year-old man with long-standing  poorly controlled diabetes mellitus visits his primary care physician for a follow-up after recent hospitalization. The patient experienced an episode of acute renal failure while in the hospital and his creatinine level rose to 4 mg/dl. Creatinine, a marker of renal function is produced from which of the following precursors ?

a) Glutamine, Aspartic acid and alanine

b) Glutamine, Cysteine and Glycine

c) Serine , Glycine and Methionine

d) Glycine, Arginine and Methionine

e) Glutamic acid, Cysteine and Glycine

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A 6-month-old infant is seen in the emergency room with a fractured rib and subdural hematoma. The child’s hair is thin, colorless and tangled. His serum copper level is 4.5 nM/L (Normal range is 5-11 nM/L). Developmental delay is apparent. Which of the following enzyme activity is most affected corresponding to the symptoms ?
a) Lysyl oxidase
b) Carboxy peptidase
c) Tyrosinase
d) Super oxide dismutase
f) Xanthine oxidase

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