Viruses can only be grown in the laboratory in
Correct answer: B. living cells, such as chick embryos or cell cultures
- A. sterile nutrient agar plates
- B. living cells, such as chick embryos or cell cultures
- C. rich broth shaken with oxygen
- D. extracts of sterile soil
Explanation
Because viruses have no metabolism of their own, they multiply only inside living host cells, so laboratories use cell cultures, chick embryos or live animals. This obligate dependence on cells is exactly why artificial media fail.
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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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