Question Detail

MIC 121 GENERAL CHARACTERISTICS AND STRUCTURE OF VIRUSES Objective Question
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Question

The envelope of a virus is a lipid bilayer membrane derived from which source, and what unique components does it contain?
Options
A It is synthesized entirely by viral enzymes and contains viral DNA.
B It is derived from host cell membranes during viral release and contains virus-specific proteins.
Correct Answer
C It is a protein coat formed by capsomeres and contains host enzymes.
D It is a polysaccharide layer from the host cell and contains host receptors.
Correct Answer

Option B is the correct answer.

Detailed Explanation

The text explains, 'An envelope is a lipid bilayer membrane that some viruses have outside their capsids. The lipid bilayer is derived from host cell membranes during viral release, but virus-specific proteins replace the proteins.' These virus-specific proteins often form 'spikes' or 'peplomers'.

Hint

The envelope is 'borrowed' from the host but modified by the virus.

Question Info

Course: MIC 121
Topic: GENERAL CHARACTERISTICS AND STRUCTURE OF VIRUSES
Type: Objective
Difficulty: Not specified
Question 141 of 984
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