During a community health workshop on respiratory illnesses, a nurse explains why standard antibacterial medications cannot cure infections such as the common cold or viral pneumonia. What biological characteristic of viruses makes them unaffected by antibacterial drugs?
- AViruses possess a dense peptidoglycan cell wall that prevents antibiotic molecules from penetrating into the core.
- Viruses lack cellular structures and metabolic pathways of their own, relying instead on host cells to replicate.Cevap
- CViruses reproduce independently through binary fission at a rate faster than antibiotics can inhibit.
- DViruses synthesize specialized metabolic enzymes that actively break down antibacterial compounds.
Cevap
Viruses lack cellular structures and metabolic pathways of their own, relying instead on host cells to replicate.
Antibiotics function by specifically disrupting bacterial cellular targets, such as peptidoglycan cell wall synthesis, bacterial ribosomes, or unique metabolic pathways. Because viruses are acellular entities composed solely of nucleic acid enclosed in a protein capsid and rely entirely on host cells for replication, they lack the targets required for antibacterial drugs to be effective.
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Pathogen Classification and Mechanism of Antibiotic Selectivity
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