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Antimicrobial Chemotherapeutic Agents

Antimicrobial Chemotherapeutic Agents
Which of the following drugs involves modification of the drug by enzymatic modification or degradation of its active element to alter its/their resistance?

Choloramphenicol
Pencillins
Aminoglyosides
All of these

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Antimicrobial Chemotherapeutic Agents
Polyene antibiotics are

any of these
small ring structures
large ring structures
β-lactam - thiazolidine ring

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Antimicrobial Chemotherapeutic Agents
Novobiocin can be used against

gram -ve Meningococci & Gonococci
all of these
Haemophilus
gram +ve Staphylococci

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Antimicrobial Chemotherapeutic Agents
The antibiotics not having good activity against Enterobacteriaceae is

clindamycin
ciprofloxacin
cefoxitin
trimethoprim-sulphamethoxazole

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Antimicrobial Chemotherapeutic Agents
The scientist who first discovered the substance penicillin was

Alexander Fleming
Joseph Lister
none of these
Paul Ehrlich

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Antimicrobial Chemotherapeutic Agents
Bacterial cells susceptible to penicillium can be protected from destruction if the medium in which they are exposed is of

high osmotic pressure
moderate osmotic pressure
high surface tension
low osmotic pressure

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