Medical MCQs

5099 MCQs  (Page 28 of 510)

Free radicals are chemical species which have______________?
A. Single unpaired electron in an outer orbit
B. Single paired electron in an outer orbit
C. Double unpaired electron in an outer orbit
D. Double paired electron in an outer orbit
Denaturation of double stranded DNA involves_______________?
A. It gets broken down to nucleotides
B. It becomes single stranded reversibly
C. It becomes single stranded irreversibly
D. It becomes double stranded irreversibly
R-RNA is mainly produced mainly in___________?
A. Nucleus
B. Nucleolus
C. Ribosome
D. Endoplasmic reticulum
All are true of the genetic code except____________?
A. Degenerate
B. Universal
C. Punctuation
D. Non overlapping
End product of purine metabolism is______________?
A. Creatinine
B. Uric acid
C. Xanthine
D. Phosphates
Codons are present on_____________?
A. M-rna
B. Dna
C. T-rna
D. Ribosomal rna
Chargaff rule states that___________?
A. A+g=t+c
B. A/t=g/c
C. A=u=t=g=c
D. A+t=g+c
Translation occurs at______________?
A. Mitochondria
B. Centrosome
C. Nucleus
D. Ribosome