Chapter 4 -- Bacterial External Structures

Question 1

Flagella

Answer 1

3 parts: Filament (long, thin, helical structure composed of protein flagellin), Hook (curved sheath which helps with movement), Basal body (stack of rings firmly anchored in cell wall) – rotates 360 degrees – functions in motility

Question 2

2 Major Groups of Appendages

Answer 2

Motiity: flagella and axial filaments (periplasmic flagella or endoflagella) and Attachment (or channels, fimbriae and pili)

Question 3

Monotrichous

Answer 3

single flagellum at one end

Question 4

Lophotrichous

Answer 4

small bunches (or tufts) emerging from the same site

Question 5

Amphitrichous

Answer 5

1 flagella at both ends of the cell

Question 6

Peritrichous

Answer 6

flagella dispersed over the surface of the cell