Flagella and Axial Filaments

Question 1

What are flagella?

Answer 1

Long filamentous appendages

Question 2

Flagella are not present in all bacteria, but when they are present they have additional functions other than motility, 2

Answer 2

Binding to cells and substrates
Secretion outside of the cell

Question 3

What are the three parts that make up the structure of the flagella? (proximal to distal)

Answer 3

basal body
hook
filament

Question 4

What protein is the filament of the flagella composed of?

Answer 4

Flagellin

Question 5

What is an atrichious flagellar arrangement?

Answer 5

no flagella present

Question 6

What is a monotrichous flagellar arrangement

Answer 6

filament, polar

Question 7

What is a lophotrichous flagellar arrangement?

Answer 7

Two or more filaments that are polar

Question 8

What is an amphitrichous flagellar arrangement?

Answer 8

Multiple filaments on each end

Question 9

What is a peritrichous flagellar arrangement?

Answer 9

Filaments distributed all around the cell

Question 10

What structure is analogous to a flagella but is built into the membrane of spiral shaped bacteria?

Answer 10

Axial Filaments (striping on a cnady cane)

Question 11

How do axial filaments create motion for spiral shaped bacteria?

Answer 11

Contraction in opposing directions causing the bacteria to rotate

Question 12

What are the advantages of motility for bacteria?

Answer 12

Migration to areas where it has the best chance of survival and replication

Question 13

Movement toward or away from a stimulus

Answer 13

Taxis

Question 14

Movement based on chemicals

Answer 14

Chemotaxis

Question 15

movement based on light

Answer 15

Phototaxis