All of the following statements are true regarding the attachment or adsorption of the virion to the host cell EXCEPT that:
Correct answer: D. None of the above
- A. For naked virions, the surface capsid proteins are responsible for binding to a specific cell receptor
- B. For enveloped viruses, the spikes are responsible for binding to a specific cell receptor
- C. Cell lacking a receptor for a specific virus is not infected by that virus
- D. None of the above
Explanation
The virus attachment protein is the viral protein that facilitates the docking of the virus to the plasma membrane of the host cell, the first step in gaining entry into a cell. All of the above statements are true regarding the attachment or adsorption of the virion to the host cell. So, option D is correct.
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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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