Top 1000+ Solved Microbiology MCQ Questions Answer
Q. Griseofluvin is obtained from
a. Penicillium notatum
b. Streptomyces griseus
c. Penicillium griseofluvin
d. None of these
Q. All of the following drugs act on cellmembrane, except
a. Novobiocin
b. Nystatin
c. Chloromycetin
d. Colicins
Q. Cycloserine related to the amino acid instructure
a. Serine
b. Aspergine
c. Alanine
d. None of these
Q. In Tuberculosis therapy mainly usedantibiotic is
a. Penicillin
b. Streptomycin
c. Chloramphenol
d. Cycloserine
Q. The antibacterial action of penicillin is dueto its effect on
a. Cell membrane permeability
b. Cell wall synthesis
c. DNA synthesis
d. Protein synthesis
Q. The antibiotic produced from Bacillussubtilis is
a. Vancomycin
b. Bactiracin
c. Both a and b
d. None of these
Q. bacitracin sensitivity test is done for
a. Pneunocci
b. Group ‘A’ Streptococci
c. Gonococci
d. Staphylococci
Q. The effect of antibiotics on micro organisms is mainly due to
a. Inhibition of cell-wall synthesis
b. Damage to the cytoplasmic membrane
c. Inhibition of nucleic acid and protein synthesis
d. All of the above
Q. The antibiotic acting on cell wall is
a. Penicillin
b. Bacitracin
c. Cyclosporin
d. All of the above
Q. Erythromycin belongs to chemical classof antibiotics
a. â-lactose
b. Tetracyclines
c. Macrolides
d. Aminoglycosides
Q. Bacterial resistance to antibiotics istransmitted by
a. Transduction
b. Transformation
c. Mutation
d. Plasmids
Q. Erythromycin inhibits protein synthesis by
a. Attaching to 30 S ribosome unit
b. Attaching to 50 S unit or ribosome
c. By the attachment to t-RNA
d. By the attachment to m-RNA
Q. The function of (THFA) Tetrahydrofolic acidcoenzyme include
a. Amino acid synthesis
b. Thymidine synthesis
c. Protein synthesis
d. Both a and b
Q. Resistant to drugs in tuberculosisdevelops by
a. Transduction
b. Transformation
c. Conjugation
d. Mutation
Q. Which of the following is penicillinaseresistang acid labile penicillin?
a. Amoxycillin
b. Cloxacillin
c. Carbenicillin
d. Methicillin