Protein Questions Online Test 12 10:17:00 PM Posted by AEI Online Tutor No Comments Potein Questions Online Test 12 1. In urea synthesis, the amino acid functioning solely as an enzyme activator: N-acetyl glutamate Ornithine Citrulline Arginine Answer 2. The enzyme carbamoyl phosphate synthetase requires Mg++ Ca++ Na+ K+ Answer 3. Control of urea cycle involves the enzyme: Carbamoyl phosphate synthetase Ornithine transcarbamoylase Argininosuccinase Arginase Answer 4. Transfer of the carbamoyl moiety of carbamoyl phosphate to ornithine is catalysed by a liver mitochondrial enzyme: Carbamoyl phosphate synthetase Ornithine transcarbamoylase N-acetyl glutamate synthetase N-acetyl glutamate hydrolase Answer 5. A compound serving a link between citric acid cycle and urea cycle is Malate Citrate Succinate Fumarate Answer 6. The 2 nitrogen atoms in urea are contributed by Ammonia and glutamate Glutamine and glutamate Ammonia and aspartate Ammonia and alanine Answer 7. In carcinoid syndrome the argentaffin tissue of the abdominal cavity overproduce Serotonin Histamine Tryptamine Tyrosine Answer 8. Tryptophan could be considered as precursor of Melanotonin Thyroid hormones Melanin Epinephrine Answer 9. Conversion of tyrosine to dihydroxyphenylalanine is catalysed by tyrosine hydroxylase which requires NAD FAD ATP Tetrahydrobiopterin Answer 10. The rate limiting step in the biosynthesis of catecholamines is Decarboxylation of dihydroxyphenylalanine Hydroxylation of phenylalanine Hydroxylation of tyrosine Oxidation of dopamine Answer Protein Questions Online Test => 1.. 10.. 11.. 12.. Share this AEI Online Tutor
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