Medical MCQs

5099 MCQs  (Page 34 of 510)

Histidine is converted to histamine by_____________?
A. Transamination
B. Hydroxylation
C. Decarboxylation
D. Reduction
A mutation that converts an amino acid codon to a stop codon is a_____________?
A. Nonsense mutation
B. Transversion
C. Silent mutation
D. Frame shift mutation
Key enzyme in urea synthesis is____________?
A. Urease
B. Carbamyl synthetase
C. Arginase
D. Ornithine
Quaternary structure of protein is_____________?
A. The arrangement sequence of amino acids in the polypeptide chain
B. Inter relation between amino acids in a single polypeptide chain
C. Inter relation of amino acids in 2 polypeptide chains
D. The inter relation and arrangement of polypeptides in a protein with more than 2 polypeptide chains
Glycine is present in____________?
A. hemoglobin
B. glutathione
C. purines
D. creatine