Study Biology

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Microbiology

Study Pack

Set 20 Antimicrobial Drugs

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Question 1

(Multiple Choice)

Free
Which of the following methods of action would be bacteriostatic?

A)competitive inhibition with folic acid synthesis
B)inhibition of protein synthesis
C)injury to plasma membrane
D)inhibition of cell wall synthesis
E)competitive inhibition with DNA gyrase

Answer

Question 2

(Multiple Choice)

Free
Table 20.1
The following data were obtained from a broth dilution test.
 Concentration of Antibiotic X Growth  Growth in Subculture 2μg/ml++10μg/ml−+15μg/ml−−25μg/ml−−\begin{array} { | c | c | c | } \hline \begin{array} { c } \text { Concentration of Antibiotic } \\\mathrm { X }\end{array} & \text { Growth } & \text { Growth in Subculture } \\\hline 2 μg /\mathrm { ml } & + & + \\\hline 10 μg/ \mathrm { ml }& - & + \\\hline 15 μg/ \mathrm { ml } & - & - \\\hline 25μg/ \mathrm { ml } & - & - \\\hline\end{array}
-In Table 20.1,as illustrated by the data shown,the minimal bactericidal concentration of antibiotic X is

A)2 μg/ml.
B)10 μg/ml.
C)15 μg/ml.
D)25 μg/ml.
E)The answer cannot be determined based on the information provided.

Answer

Question 3

(Multiple Choice)

Free
Antimicrobial peptides (AMPs)frequently work by

A)inhibiting protein synthesis.
B)disrupting the plasma membrane.
C)complementary base pairing with DNA.
D)inhibiting cell-wall synthesis.
E)hydrolyzing peptidoglycan.

Answer