Bacterial species differ in the number and arrangement of flagella on their surface; some have a single flagellum (monotrichous), a flagellum at each end (amphitrichous), clusters of flagella at the poles of the cell (lophotrichous), while others have flagella distributed over the entire surface of the cell (peritrichous). The bacterial flagella is the best-understood motility structure in any organism and is made of about 20 proteins, with approximately another 30 proteins required for its regulation and assembly. The flagellum is a rotating structure driven by a reversible motor at the base that uses the electrochemical gradient across the membrane for power. This motor drives the motion of the filament, which acts as a propeller. COUNT 5
QSN1 What is monotrichous? ANS1 single flagellum QSN2 How many proteins is typical flagellum consist os? ANS2 20 proteins QSN3 When flagellum is distributed throughout the surface of the cell? ANS3 peritrichous QSN4 If bacteria has flagellum at each end what is the name of the species? ANS4 amphitrichous QSN5 How does flagellum function within the cell? ANS5 uses the electrochemical gradient across the membrane