USMLE step 1 - biochemistry Questions and Answers well Explained Latest 2024/2025 Update 100% Correct.
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Course
USMLE - biochemistry
Institution
USMLE - Biochemistry
what must happen in the nucleus so that 7-methylguanosine can be added to RNA in the cytosol? -
5' capping
treatment of hyperammonemia (HCV, urea cycle deficiency) - limit protein in diet
benzoate, phenylbutarate (bind a.a.'s, increased aa exretion)
actulose (acidify GI tract, trap NH4 for excr...
hepatosplenomegaly, aseptic necrosis of femur, bone crises, macrophages that look like crumpled tissue
paper - Gaucher's sphingolipidosis (glucocerebroside accumulation)
cherry macula, neurodegenration, lysosomes with onion skin, NO hepatisplenomegaly - tay-sachs
(GM2 ganglioside)
causes of albinism - tyrosine transporter defect
tyrosine hydroxylase deficiency
lack of migration of neural crest cells (melanocytes)
where do preganglionic parasympathetic neurons originate? - nuclei of cranial nerves
sacral spinal cord (S2-S4)
where do preganglionic sympathetic neurons originate? - thoracolumbar spinal cord (T1-L3)
arginine derivatives - creatine
urea (urea cycle intermediate)
NO
glutamate derivatives - GABA
glutathione
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