Medical MCQs

5099 MCQs  (Page 32 of 510)

Unwinding of DNA is done by____________?
A. Dnase
B. Topo isomerase
C. Ligase
D. Reverse transcriptase
Nonsense codons bring about__________________?
A. Elongation of polypeptide chain
B. Pre-translational modification of protein
C. Initiation of protein synthesis
D. Termination of protein synthesis
Major source of ammonia in the kidney is___________?
A. Urea aspartate
B. Aspartate
C. Glutamine
D. Glutamate
Creatine is formed metabolically from______________?
A. Tryptophan
B. Arginine
C. Phenylalanine
D. Histidine
Which of the following is correct about breakdown of hemoglobin (Hb)_____________?
A. Hb→heme→bilirubin→urobilinogen
B. Heme→hb→biliverdin→urobilinogen
C. Hb→heme→bilverdin→uro bilinogen
D. Hb→heme→bilirubin→urobilinogen→biliverdin
Heme in haemoglobin is____________?
A. Between helix c and d
B. Surrounded by non polar environment
C. Bonded to e7 histidine
D. Protoporophyrin ix
Cytochromes are_____________?
A. Pyridine nucleotides
B. Riboflavin containing nucleotides
C. Metal containing flavoproteins
D. Iron-porphyrin proteins