6.3.2 Explain why antibiotics are effective against bacteria but not against viruses.Antibiotics work by targeting parts of the bacterial (prokaryotic) cell unique to the prokaryote such as 70S ribosomes, the cell wall, and enzymes found only in prokaryotes. There are two types of drug which affect bacterial growth and these are Bacteriostatic (which cease bacterial growth when present, but when removed bacterial growth continues) and Bacteriocidal (which kill the bacterial cells outright. Antibiotics are NOT effective against viruses because the viruses utilise the host cells' metabolic pathways in order to reproduce and the antibiotics do not affect the host cells' metabolic pathways.
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