Chapter 2/4: Bacterial External Features Flashcards Preview

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Flashcards in Chapter 2/4: Bacterial External Features Deck (27):
1

What four structures are found outside the bacterial envelope?

Flagella, Pili, Capsule, Surface array

2

What is the primary purpose of flagella?

Motility

3

What are the hollow, rigid filaments is flagella made of?

Flagellin

4

What term means a single flagellum at one pole?

Monotrichous

5

What term means two flagella at the same pole?

Bitrichous

6

What term means a flagella at each pole?

Amphitrichous

7

What term means a tuft of three or more flagella?

Lophotrichous

8

What term means a tuft of three or more flagella at both poles?

Amphilophotrichous

9

What is the name for a non-polar arrangement of flagella?

Peritrichous

10

What is flagella rotation driven by in bacteria?

Proton motive force

11

What are the three basic pieces of bacterial flagella?

Filament, Hook protein, Basal body

12

What piece of the bacterial flagella contains multiple flagellin proteins and is 5-10 um long?

Filament

13

What piece of the bacterial flagella connects the filament to the basal body and is the site of rotation?

Hook protein

14

What piece of the bacterial flagella produces torque on filament to turn it like a propeller?

Basal body

15

What piece of the bacterial flagella extends from the cytoplasm to cell wall?

Basal body

16

What two terms describe bacterial motility?

Runs, Tumbles

17

What is the name for internal flagella?

Spirochete

18

What type of filaments extend from the plasma membrane into the periplasm?

Axial filaments

19

What are two types of non-flagellar bacterial motility?

Gliding motility, Twitching motility

20

What bacterial structure helps cells stick to surfaces and is sometimes referred to as pili?

Fimbrae

21

What bacterial structure helps cells transfer DNA and plasmids between cells?

Pili

22

What bacterial structure is composed of a thick layer of polysaccharides surrounding the cell wall?

Capsules

23

What bacterial structure allows adhesion to surfaces and defense against host immunity?

Capsules

24

What bacterial structure can be used as an emergency organic carbon source?

Capsules

25

What structure is composed of a crystalline array of interlocking proteins?

S-Layer

26

What type(s) of cell(s) is/are S-layers found?

Gram positive, Gram negative

27

What structure protects against predation, infection, and pH changes?

S-Layer