SCIENCE
VIRUS AND BACTERIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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pili are used for movement, flagella for reproduction
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pili are used for protection, flagella for movement
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pili are used for reproduction, flagella for movement
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pili are found in bacteria, flagella are not.
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Detailed explanation-1: -Pili are shorter and thinner than flagella. While flagella are rigid, with torque generated by the motor, pili are less rigid and straighter. Pili can be found evenly around the surface of the cell, or localized to one or both of the poles.
Detailed explanation-2: -Type IV pili serve a variety of functions including motility along solid surfaces [7, 8], adhesion to eukaryotic host cells [9, 10], microcolony/biofilm formation [11–13], and horizontal gene transfer [14].
Detailed explanation-3: -Flagella are helical appendages that protrude through the cell membrane and are long and whip-like. Pili are hollow filamentous extensions that emerge from the cell’s surface.
Detailed explanation-4: -Pili or Conjugative Pili They are also termed as “sex pili” as they facilitate gene transfer and recombination in the bacterial cell. It is a primitive mode of sexual reproduction in bacteria.
Detailed explanation-5: -Also, flagella are seen in gram negative and gram positive bacteria and originate from the cell wall, pili are seen in gram negative bacteria and originate from the cytoplasmic membrane.