36. The scientist who first discovered the substance penicillin was
A.Joseph Lister
B.Alexander Fleming
C.Paul Ehrlich
D.none of these

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37. The larger the __________ , the better the chemotherapeutic agent.
A.therapeutic index
B.therapeutic dose
C.selective toxicity
D.spectrum

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38.  Chelate forming peptide antibiotic are/is
A.bleomycins
B.sideromycins
C.both (a) and (b)
D.vancomycin

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39. With which of the following aminoglycosides interfere?
A.Protein synthesis
B.DNA function
C.Cell wall synthesis
D.Cell membrane function

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40. Which of the following protein synthesis mechanisms may be affected by particular drugs?
A.Peptide bond formation
B.mRNA translocation
C.Aminoacyl-tRNA binding
D.All of these

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41. The antibiotics not having good activity against Enterobacteriaceae is
A.clindamycin
B.cefoxitin
C.trimethoprim-sulphamethoxazole
D.ciprofloxacin

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42. Quinones and related antibiotics are
A.tetracyclines
B.actinorhodin
C.mitomycin
D.all of these

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