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The outer envelope of an enveloped virus is built from membrane taken from where?
AThe bacterial cell wall
BThe host cell membranes
CThe viral capsid itself
DThe extracellular fluid
Answer & Solution
Correct answer: B. The host cell membranes
1. A virion is a nucleic acid core inside a capsid, and sometimes an outer envelope as well.
2. That envelope is made of protein and phospholipid membranes derived from the host cell.
3. The capsid is a separate protein layer under the envelope, so it is not the envelope's source.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 21 "Viruses", section 21.1 Viral Evolution, Morphology, and Classification_
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