Quiz #4

Question 1

3 types of media

Answer 1

selective media
enriched media
differential media

Question 2

selective media definition

Answer 2

selects for growth of specific bact; prevents unwanted bact from growing

Question 3

enriched media definition

Answer 3

contains chemicals that enhance the growth of desired bact

Question 4

differential media definition

Answer 4

differentiates between diff types of bact

Question 5

PEA plate full name

Answer 5

Phenylethyl Alcohol Agar

Question 6

what type of media is PEA

Answer 6

selective

Question 7

selective agent for PEA

Answer 7

Phenylethyl Alcohol

Question 8

what does Phenylethyl Alcohol select for

Answer 8

Gram-positive bact

Question 9

MSA Plate full name

Answer 9

Mannitol Salt Agar

Question 10

what type of media is MSA

Answer 10

Selective & Differential

Question 11

selective agent in MSA

Answer 11

7.5% NaCl

Question 12

what does 7.5% NaCl select for

Answer 12

Salt-tolerant bact

Question 13

What does it mean if there is growth on an MSA plate

Answer 13

bact is salt-tolerant

Question 14

what does it mean if there is no growth on an MSA plate

Answer 14

bact is not salt-tolerant

Question 15

differential agents in MSA Plate

Answer 15

mannitol
phenol red

Question 16

phenol red role in MSA plate

Answer 16

pH indicator

Question 17

color of phenol red in acidic environment

Answer 17

yellow

Question 18

color of phenol red in neutral environment

Answer 18

red

Question 19

color of phenol red in basic environment

Answer 19

bright pink

Question 20

what does the MSA plate differentiate between

Answer 20

mannitol fermenters
non-mannitol fermenters