Medical MCQs

5099 MCQs  (Page 30 of 510)

The sigma subunit of prokaryotic RNA polymerase_______________?
A. Binds the antibiotic rifampicin
B. Is inhibited by a-amanitin
C. Specifically recognizes the promoter site
D. Is part of the core enzyme
Serum creatine kinase-3 (CK-3) is elevated in_______________?
A. Muscular dystrophy
B. Myocardial infarction
C. Alcoholic cirrhosis
D. Brain tumours
Transcription is the synthesis of____________?
A. Single stranded complimentary copy of dna
B. Double stranded complimentary copy of dna
C. Complimentary copy of rna
D. Complimentary copy of rrna
Which of the following is used in recombinant DNA technology ?
A. Restriction endonucleases
B. Pcr
C. Reverse transcriptase fish
D. None of these
Mutations are due to changes in_________________?
A. Dna nucleotide sequence
B. Rna nucleotide sequence
C. Amino acid sequence of ribonuclease
D. Cell walls
Kinase requires_______________?
A. Mn++
B. Cu++
C. Mg++
D. Inorganic phosphate
Highest binding of iron in plasma is seen with___________?
A. Transferrin
B. Ferritin
C. Hemoglobin
D. Ceruloplasmin