3.2 learning outcomes

Question 1

What are the external sections of the bacterial cell

Answer 1

• Appendages (Flagella, Pili, Fimbriae)
• Glycocalyx
  -Capsule
  -Slime layer
• Axial filaments

Question 2

Internal structures (CEMP IN CR)

Answer 2

CEMP IN CR
cytoskeleton
Endospore
Plasmid
Microcompartments

Inclusions
Nucleoid/chromosome

Cytoplasm
Ribosomes

Question 3

Flagellum function

Answer 3

Motility

Question 4

Flagellum is separated into 3 distinct parts: What are they?

Answer 4

Filament- outermost region
Hook- attaches to the filaments
Basal body- consists of rod and pairs of rings; anchors flagellum to the cell wall and membrane

Question 5

Filament

Answer 5

Outermost region

Question 6

Hook

Answer 6

attaches to the filament

Question 7

Basal body

Answer 7

consists of rod and pairs of rings; anchors flagellum to the cell wall and membrane

Question 8

Polar arrangement of flagella (4 types)

Answer 8

Monotrichous: single flagellum

Lophotrichous: small bunches or tufts of flagella emerging from the same site

Amphitrichous: flagella at both poles of the cell

Peritrichous arrangement:
Flagella are dispersed randomly over the surface of the cell

Question 9

Monotrichous

Answer 9

single flagellum

Question 10

Lophotrichous:

Answer 10

small bunches or tufts of flagella emerging from the same site

Question 11

Amphitrichous:

Answer 11

: flagella at both poles of the cell

Question 12

Peritrichous arrangement

Answer 12

Flagella are dispersed randomly over the surface of the cell.