MCQ Book Questions

Q50140. Abnormalities of blood clotting are

Q50141. An important reaction for the synthesis of amino acid from carbohydrate intermediates is transamination which requires the cofactor:

Q50142. The main sites for oxidative deamination are

Q50143. A positive nitrogen balance occurs

Q50144. The main site of urea synthesis in mam- mals is

Q50145. The enzymes of urea synthesis are found in

Q50146. The number of ATP required for urea synthesis is

Q50147. Most of the ammonia released from L-α- amino acids reflects the coupled action of transaminase and

Q50148. In urea synthesis, the amino acid function- ing solely as an enzyme activator:

Q50149. The enzyme carbamoyl phosphate synthetase requires

Q50150. Control of urea cycle involves the enzyme:

Q50151. Transfer of the carbamoyl moiety of carbamoyl phosphate to ornithine is catalysed by a liver mitochondrial enzyme:

Q50152. A compound serving a link between citric acid cycle and urea cycle is

Q50153. The 2 nitrogen atoms in urea are contributed by

Q50154. In carcinoid syndrome the argentaffin tissue of the abdominal cavity over- produce

Q50155. Tryptophan could be considered as precursor of

Q50156. Conversion of tyrosine to dihydroxyphe- nylalanine is catalysed by tyrosine hy- droxylase which requires

Q50157. The rate limiting step in the biosynthesis of catecholamines is

Q50158. The enzyme dopamine β-oxidase which catalyses conversion of dopamine to norepinephrine requires

Q50159. In humans the sulphur of methionine and cysteine is excreted mainly as