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Antibiotics and Mechanism of Action

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Questions and Answers

What is a key requirement for an antibiotic to be effective?

It must not affect humans (correct)
It must be produced by one microbe that adversely affects other microbes
It must be bactericidal
It must be effective against viruses

What is the term for the minimum concentration of an antibiotic that prevents the growth of a microorganism?

Minimal lethal concentration
Minimal inhibitory concentration (correct)
Bacteriostatic concentration
Bactericidal concentration

What is the purpose of the Kirby-Bauer Disk Susceptibility test?

To test the sensitivity of bacteria to multiple antibiotics (correct)
To test the effect of antibiotics on bacterial DNA synthesis
To measure the minimal inhibitory concentration of an antibiotic
To determine the bactericidal or bacteriostatic nature of an antibiotic

What is the mode of action of beta-lactam antibiotics such as penicillin?

They bind to penicillin-binding proteins and inhibit cell wall synthesis (D) Signup and view all the answers

What is the term for the process by which antibiotics are overprescribed and misused in farm animal feed?

Antibiotic abuse (C) Signup and view all the answers

Who is credited with the discovery of streptomycin?

Selman Waksman (D) Signup and view all the answers

What is the term for antibiotics that are effective against many species of bacteria?

Broad spectrum (B) Signup and view all the answers

What is the mechanism of action of quinolone antibiotics?

They block bacterial DNA gyrase (C) Signup and view all the answers

What is the term for the minimal concentration of an antibiotic that is lethal to a microorganism?

Minimal lethal concentration (D) Signup and view all the answers

What is the mechanism of action of sulfa drugs?

They are analogs of PABA and prevent DNA synthesis (B) Signup and view all the answers