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Flashcards in Bacteria and Culturing Deck (54)
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1

Bacteria are between ____ microns in length

0.5-5

2

3 shapes of bacteria

1. Cocci (round)
2. Bacilli (rod)
3. Spirilli (spiral)

3

Bacteria are anucleated, or ________

prokaryotic

4

Rigid, outer layer of a bacteria cell that gives it shape and protection

Cell wall

5

Most bacteria have cell walls, but what kind doesnt?

mycoplasma

6

Selectively permeable that controls what enters and exits the bacteria cell

cell membrane

7

Part of the bacteria cell that contains nutrients and organelles

Cytoplasm

8

Site of cellular division in a bacteria cell

Mesosomes

9

Gelatinous covering around the outside of the cell that helps the cell be antiphagocytic

Capsules

10

Part of a cell used for locomotion

flagella

11

Facilitates the adherence of bacteria to mucous membranes

Pilli/Fimbria

12

Makes the bacteria cell hard to kill by making it resistant to disinfection and helps the bacteria survive pasteurization
Ex: Clostridium piliforme

Spores/Endospores

13

A source of energy for bacteria that comes from organic molecules

Carbon

14

A source of energy for bacteria that is a biproduct of protein metabolism

Nitrogen

15

What percentage of a bacteria cell's weight is water?

7-10%

16

What is the optimal pH for bacterial growth?

7-7.5

17

Optimal temperature for bacterial growth?

35-37 Celsius
95-98.6 Fahrenheit

18

Optimal temperature for pathogenic bacteria?

20-40 Celsius
68-104 Fahrenheit

19

How do bacteria reproduce?

Binary fission (asexually)

20

Bacteria that grow well in the presence of O2

Aerobic

21

Bacteria that grow well with lack of O2

Anaerobic

22

Bacteria that grow +/- O2

Facultative

23

Bacteria that need a certain amount of O2

Microaerophilic

24

Bacteria that grows best at 20-40 celsius with optimal growth at 35-37 celsius
Most pathogenic bacteria

Mesophilic

25

Cold loving bacteria that optimally grows at 0-30 Celsius

Psychrophiles

26

Hot loving bacteria that optimally grows at 40-80 Celsius
Survive pasteurization and hot springs

Thermophilic

27

5 Body fluids/organs that should be sterile

1. blood
2. urine
3. CSF
4. synovial fluids
5. lungs

28

Good bacteria that produce vitamins and prevent dz

Normal Flora

29

Normal flora can be found in 4 places

1. GI tract
2. upper respiratory tract
3. skin
4. anterior urethra

30

Normal flora compete with pathogenic organisms for nutrients and space and produce toxins that are harmful to pathogenic microorganisms

Microbial Antagonists