Which of the following statements is true of the tetracyclines?
A) They are bactericidal.
B) Tetracyclines interfere with the synthesis of bacterial protein by binding at the 50S subunit of bacterial ribosomes.
C) In the study of sensitivity or organisms isolated from dental infections,one-fifth to two-fifths of Staphylococcus aureus (S.aureus) were found to be resistant to tetracycline.
D) Tetracyclines are not prone to enterohepatic circulation.
Correct Answer:
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C)a
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