Attachment of the bacteriophage with the receptor site on the bacterial cell wall involves_______________?
Correct answer: B. Week chemical unior between them
- A. Strong covalent bond between virion and the receptor site.
- B. Week chemical unior between them
- C. Both A and B depending upon the phage
- D. None of these
Explanation
Phage attachment to a bacterial receptor is a specific, reversible interaction involving weak non-covalent forces rather than a strong covalent bond. Students may choose both A and B because they interpret attachment as requiring a permanent chemical linkage, but covalent bonding would prevent the normal reversible recognition step.
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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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