BIOLOGICAL CLASSIFICATION
VIRUSES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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helps attach to a cell
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connects the “head” to “tail” and helps produce the nucleic acid
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contracts to push out the nucleic acid
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gives support and helps attach to a cell
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Detailed explanation-1: -The collar and whiskers help to attach six long tail fibers to the phage particle during the virus assembly and control the retractions of the long tail fibers under conditions unfavorable for infection.
Detailed explanation-2: -The large majority of bacterial viruses (phages or bacteriophages) have a double-stranded DNA (dsDNA) genome and are comprised of an icosahedral capsid, or head, which protects the viral genome, and of a tail structure, a device that delivers the genome to the host cell.
Detailed explanation-3: -The contractile tail improves the efficiency of infection by making it possible for the tail tube to penetrate the outer host cell membrane prior to the delivery of phage DNA into the host cell.
Detailed explanation-4: -The nucleic acids of bacteriophages are characterized by a surprising multiformity. RNA and DNA may occur, the latter in single-or double-stranded form, circular or linear, with or without breaks or single-strand ends.