J. External Cell Structures

Question 0

Negative chemotaxis

Answer 0

Movement away from stimuli

Question 1

Flagella

Answer 1

Rotates to create movement

Counterclockwise - “runs” forward

Clockwise - “tumbles” stops
Twiddles - jiggles in place

Question 2

Positive chemotaxis

Answer 2

Movement towards a stimulus

Question 3

Flagella:

Monotrichous

Answer 3

Polar (at one end)

“Hair”

Question 4

Flagella:

Lophotrichous

Answer 4

Polar

“Tuft”

Question 5

Flagella:

Amphitrichous

Answer 5

2 poles

Question 6

Flagella:

Peritrichous

Answer 6

Flagella dispersed randomly

Question 7

Attachment appendages

Answer 7

Fimbriae - adhesion to the host
Short, many, bristle like

Ex. Gonnorreha

Question 8

Channel appendages

Answer 8

Sex pili(us)

Hollow appendage used to bring two bacterial cells together in the process of conjugation to transfer DNA

Question 9

Glycocalyx

Answer 9

“Sugar coating” of polysaccharides

Question 10

Glycocalyx:

Capsule

Answer 10

Thick, rigid, tightly bound to the cell

Helps with adhesion to each other, and host

Help to resist phagocytosis

Question 11

Glycocalyx:

Slime

Answer 11

Thin, flexible, loosely bound, wash off easily

Resists drying out