ANTIMICROBIAL CHEMOTHERAPEUTIC AGENTS QUIZ

When using alcohol as an antiseptic, which concentration is considered most effective?

70%

50%

25%

95%

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following drugs may show plasmid-mediated resistance?

Nalidixic acid

Methicillin

Ampicillin

Rifampicin

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following may cause resistance to penicillin?

Alteration or lack of penicillin-binding proteins

All of these

Production of β-lactamases by bacteria

Impermeability of cell envelope

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not β-lactamase-resistant penicillin?

Methicillin

Carbenicillin

Oxacillin

Nafcillin

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Aminoglyosides

Choloramphenicol

All of these

Pencillins

TRUE ANSWER : ?
YOUR ANSWER : ?

Chemotherapeutic agents must

be able to come in contact with the parasite by penetrating the cells

All of these

leave unaltered the host's natural defense mechanisms

prevent/destroy the activity of a parasite

TRUE ANSWER : ?
YOUR ANSWER : ?

The most selective antibiotics are those that interfere with the synthesis of

bacterial RNA

bacterial cell walls

bacterial plasma membrane

bacterial DNA

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following tests is used to determine the minimal lethal concentration?

Dilution susceptibility tests

Agar dilution test

All of these

Broth dilution test

TRUE ANSWER : ?
YOUR ANSWER : ?

Fluoroquinolones are antibiotics which inhibit

RNA polymerase

DNA gyrase

DNA polymerase

Cross-linking of peptidoglycan

TRUE ANSWER : ?
YOUR ANSWER : ?

The penicillin resistant to β-lactamases is

penicillin-G

closacillin

ampicillin

carbenicillin

TRUE ANSWER : ?
YOUR ANSWER : ?

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