Multiple Choice
Which of these answers is a major difference between the release of enveloped viruses and the release of non-enveloped viruses?
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18. Viruses, Viroids, & Prions
Animal Viruses: 5. Release from Host Cell
Multiple Choice
In animal viruses, what is the typical source of a viral envelope acquired during release from the host cell?
A
The viral capsid proteins assembled in the host cytosol
B
A peptidoglycan layer synthesized by the virus during assembly
C
The host cell nucleus after viral DNA integration
D
Host cell membrane lipids and proteins acquired during budding (e.g., plasma membrane or internal membranes)
Verified step by step guidance1
Understand that the viral envelope is a lipid bilayer that surrounds some animal viruses, providing them with an outer protective layer.
Recognize that this envelope is not synthesized de novo by the virus but is instead acquired from the host cell during the process of viral release.
Identify that the typical mechanism for acquiring the envelope is through a process called 'budding,' where the virus exits the host cell by wrapping itself in a portion of the host's membrane.
Note that the source of the envelope can be the host's plasma membrane or internal membranes such as the endoplasmic reticulum or Golgi apparatus, depending on the virus.
Conclude that the viral envelope consists of host cell membrane lipids and proteins, which the virus incorporates as it buds from the host cell.
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