BIOLOGICAL CLASSIFICATION
VIRUSES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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During attachment, a specific carbohydrate on the surface of the virus sticks to a specific molecule on the membrane of the cell
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The receptor site is found on the surface of a cell
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The virus is specific and can recognize a variety of receptor sites on cells
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All viruses can infect all types of cells
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Detailed explanation-1: -Attachment proteins of enveloped viruses are generally spike-like and extend from the surface of the virion allowing the attachment protein to serve as the first point of contact with the receptor on the plasma membrane [1].
Detailed explanation-2: -Viruses attach to proteins known as cellular receptors or attachment factors on the surface of the host cell [11, 12]. In addition, certain membrane lipids and glycans may be necessary for viral entry. These factors stabilize the virus on the cell surface and allow it to circumvent the cell’s barriers to entry.
Detailed explanation-3: -Virus receptors The receptors are cell surface molecules that provide functions essential for productive infection. In simple situations, receptors can efficiently target viruses for endocytosis (Fig.
Detailed explanation-4: -All viruses need to bind to specific receptor molecules on the surface of target cells to initiate infection. Virus–receptor binding is highly specific, and this specificity determines both the species and the cell type that can be infected by a given virus.