Exam 20: Antimicrobial Drugs

Figure 20.4 The structures of the influenza drug Tamiflu and sialic acid,the substrate for influenza virus's neuramidase,are shown in Figure 20.4.What is the method of action of Tamiflu?

PABA serves as the competitive inhibitor in the action of sulfanilamides.

Penicillin does not directly kill bacteria.Why,then,is it considered to be bacteriocidal?

Which of the following statements about drug resistance is FALSE?

Which of the following antimicrobial agents is recommended for use against fungal infections?

In what way are semisynthetic penicillins and natural penicillins alike?

Figure 20.1 -In Figure 20.1,why is tetracycline selectively toxic against bacteria?

Figure 20.1 -The antibiotic tetracycline binds to the 30S subunit of the ribosome,as shown by the dark black bar on the right portion of the diagram in Figure 20.1.The effect is to

Figure 20.2 -The antibiotic chloramphenicol binds to the 50S subunit of the ribosome,as shown in Figure 20.2.The effect is to

Most of the available antimicrobial agents are effective against

Which of the following does NOT affect eukaryotic cells?

An official from an international health agency predicts that if all countries enacted legislation to only sell antibiotics with a prescription,then the rate of antibiotic resistant would "grind to a halt." Do you agree? Explain.

Which compound would be the most useful to treat candidiasis?

Mebendazole is used to treat cestode infections.It interferes with microtubule formation;therefore,it would NOT affect

Penicillin was considered a "miracle drug" for all of the following reasons EXCEPT

Antimicrobial peptides (AMPs)frequently work by

Phage therapy has been used in the past as an effective,common antiviral treatment.

Due to its target,rifamycins such as rifampin can be effective over a broad spectrum.

In the presence of penicillin,a cell dies because

From the data in Table 20.1,you can predict that the effect of the drug on a different microbe