Discussion
Streptomycin is a ______ drug.
Answer: B
Streptomycin is a bactericidal drug.
Streptomycin, an aminoglycoside antibiotic and the first drug used against tuberculosis, binds to the bacterial ribosome and causes faulty protein synthesis. This kills the bacteria outright rather than merely stopping their growth.
A bacteriostatic drug, such as tetracycline, only halts multiplication. 'Germicidal' is a general term for disinfectants that kill germs on surfaces. Fungicidal drugs act on fungi, against which streptomycin is not used.
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