(A) NAD
(B) FAD
(C) ATP
(D) Tetrahydrobiopterin
Tryptophan could be considered as precursor of?
(A) Melanotonin
(B) Thyroid hormones
(C) Melanin
(D) Epinephrine
In carcinoid syndrome the argentaffin tissue of the abdominal cavity overproduce?
(A) Serotonin
(B) Histamine
(C) Tryptamine
(D) Tyrosine
The 2 nitrogen atoms in urea are contributed by?
(A) Ammonia and glutamate
(B) Glutamine and glutamate
(C) Ammonia and aspartate
(D) Ammonia and alanine
A compound serving a link between citric acid cycle and urea cycle is?
(A) Malate
(B) Citrate
(C) Succinate
(D) Fumarate
Transfer of the carbamoyl moiety of carbamoyl phosphate to ornithine is catalysed by a liver mitochondrial enzyme:
(A) Carbamoyl phosphate synthetase
(B) Ornithine transcarbamoylase
(C) N-acetyl glutamate synthetase
(D) N-acetyl glutamate hydrolase
Control of urea cycle involves the enzyme:
(A) Carbamoyl phosphate synthetase
(B) Ornithine transcarbamoylase
(C) Argininosuccinase
(D) Arginase
The enzyme carbamoyl phosphate synthetase requires?
(A) Mg++
(B) Ca++
(C) Na+
(D) K+