BIOLOGICAL CLASSIFICATION
VIRUSES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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contracts to force viral genetic material into host cell
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produces DNA
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produces RNA
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contains the hereditary information
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Detailed explanation-1: -The sheath consists of 138 copies of the tail sheath protein, gene product (gp) 18, which surrounds the central non-contractile tail tube. The contraction of the sheath drives the tail tube through the outer membrane, creating a channel for the viral genome delivery.
Detailed explanation-2: -Attachment: Proteins in the “tail” of the phage bind to a specific receptor (in this case, a sugar transporter) on the surface of the bacterial cell. Entry: The phage injects its double-stranded DNA genome into the cytoplasm of the bacterium.
Detailed explanation-3: -The external contractile envelope of the tail of some viruses. Its contraction ensures ejection of the virus DNA into the host cytoplasm.
Detailed explanation-4: -A phage attaches to a bacterium and injects its DNA into the bacterial cell. The bacterium then turns into a phage factory, producing as many as 100 new phages before it bursts, releasing the phages to attack more bacteria. This means that phages can grow much more quickly than bacteria.