Viral spikes are protein structures that protrude from the envelope of enveloped viruses, serving as the means for attachment and fusion with host cells. They are not always present on enveloped viruses, nor do they block attachment between the virus and host. While they may interact with host proteins during attachment, they are ultimately derived from viral proteins.

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Viral Spikes

Question 18

Multiple Choice

Viral spikes

A) are always present on enveloped viruses.
B) protrude from the envelope.
C) block attachment between virus and host.
D) are derived from host proteins.
E) All of the choices are correct.

Correct Answer: