Module 2: Bacterial Anatomy

Question 1

Tetrads

Answer 1

Cocci divide in two planes at right angles to form groups of four

Question 2

Sarcinae

Answer 2

Cocci divide in three planes at right angles to form cubes of eight

Question 3

Palisades

Answer 3

Bacilli slip together after cell division lying in sheets on top of each other

Question 4

Acute angles

Answer 4

Bacilli “snap” at point of division

Question 5

Involution forms

Answer 5

Dead, degenerating, or dying

Difficult to tell of cocci or rods

Question 6

Cellular morphology

Answer 6

Microscopic appearance of bacteria on a gram stained slide

Question 7

Colonial morphology

Answer 7

Macroscopic appearance of colonies on agar plates after incubation

Question 8

Flagella

Answer 8

No found on cocci
Hollow core surrounded by several strands of protein (flagellin)
Anchored to cell wall and cytoplasmic membrane by basal body

Question 9

Atrichous

Answer 9

No flagella

Question 10

Monotrichous

Answer 10

One flagellum

Question 11

Lophotrichous

Answer 11

Up to six flagella

Lopho = tuft

Question 12

Amphitrichous

Answer 12

Flagella on both ends

Amphi = both

Question 13

Peritrichous

Answer 13

Flagella around the cell
Peri = around
Slow, non-directional movement, spinning, tumbling