THE MOLECULAR BASIS OF INHERITANCE
VIRUSES AND PRIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They are created when the viral DNA is created
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from the host’s cell membrane
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They build them after they leave the host cell
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none of these options
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Detailed explanation-1: -This envelope comes from the infected cell, or host, in a process called “budding off.” During the budding process, newly formed virus particles become “enveloped” or wrapped in an outer coat that is made from a small piece of the cell’s plasma membrane.
Detailed explanation-2: -Enveloped viruses (e.g., HIV) typically are released from the host cell by budding. During this process the virus acquires its envelope, which is a modified piece of the host’s plasma or other, internal membrane.
Detailed explanation-3: -The envelopes are typically derived from portions of the host cell membranes (phospholipids and proteins), but include some viral glycoproteins. One of the main parts of human pathogenic viruses is glycoprotein. They have been shown to play significant roles in immunity and infection.
Detailed explanation-4: -The lipid bilayer can be derived from a variety of cellular membranes with the plasma membrane being the most common source. The presence of the lipid envelope allows enveloped viruses to bud out of cells without disrupting the cell membrane and, therefore, require an intact cell for particle release.