The laboratory report shows that a motility test was performed on the sample with positive results. Thinking about bacterial movement, the RN is aware that this bacterium could possess which structure(s) for motility?

Respuesta :

Answer:

The correct answer is: Flagella.

Explanation:

  • Flagella can be defined as a long, thin and tubular projection that extends out of the body of certain bacterial cells.
  • They are constituted of a protein called flagellin.
  • They are composed of two parts, which are, the extended helical filaments that can undergo propulsion or movement and a rotary motor body that is located at the base of the filaments, attached to the plasma membrane.
  • A single bacteria can have one or more flagella.
  • The flagella undergoes propulsion or rotary movements and helps the bacteria to translocate from one place to another.
  • The rotary movement of the flagella is caused by the rotary motion of a protein complex called the Motility Protein A (Mot) complex located in the inner cell membrane anchored to the flagella.
  • A proton gradient is maintained across the inner plasma membrane of the bacteria and this generates a proton motive force which induces the mot complex proteins and the flagella to undergo the rotary motion and hence propulsion.