Antibiotics are useless against viral diseases because viruses
Correct answer: A. lack their own metabolism and the structures that antibiotics target
- A. lack their own metabolism and the structures that antibiotics target
- B. are too small for drugs to reach
- C. live only in the soil
- D. are destroyed by stomach acid
Explanation
Antibiotics attack bacterial machinery such as cell walls and 70S ribosomes, and viruses possess neither, borrowing the host's instead. Antivirals must therefore target viral enzymes like reverse transcriptase, which is why far fewer of them exist.
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About Viruses
Viruses are acellular infectious particles made of genetic material enclosed by a protein capsid, sometimes with a lipid envelope. Their replication depends on a host cell and may follow lytic or lysogenic cycles, so viral structure and reproduction differ fundamentally from those of cellular organisms such as bacteria.
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