Mycoplasmas are organisms without cell walls. Which antimicrobial agents would be ineffective in treating infections involving this bacterium?
a. Tetracycline
b. Aminoglycosides
c. Penicillin
d. Rifampin
C
Penicillin, among others, is an antibiotic that acts by binding the enzymes that are involved in cell wall synthesis. Because mycoplasmas do not have cells walls, these types of antibiotics are not effective.
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Which of the following is not a vector?
A. Fomite B. Human C. Fly D. Flea E. Fomite AND human
Which of the following is true of both T cells and B cells?
A. They are effector cells against specific pathogens. B. They are produced from stem cells of the bone marrow. C. They can help attack and destroy invading pathogens. D. They typically have a short life span. E. All of these statements are true.
An infectious agent already existing on or in the body is called ________.
A. exogenous B. axenic C. endogenous D. an exotoxin E. an enterotoxin
A radioactively labeled single-stranded DNA ________ can be used to identify a specific piece of DNA in an electrophoresis gel
Fill in the blank(s) with correct word