PAA

Question 1

What does PAA stand for?

Answer 1

Phenylethyl Alcohol Agar

Question 2

PAA is selective for what?

Answer 2

Gram-positive bacteria

Question 3

PAA would be used to isolate______ from clinicL specimens

Answer 3

Staphylococci

Streptococci

Question 4

PAA would reduce contaminates from common bacteria such as _________.

Answer 4

E. coli

Proteus

Question 5

Explain how PAA inhibits the growth of gram-negative bacteria

Answer 5

The phenylethyl alcohol breaks down the selective membrane and stops DNA replication

Question 6

What is the function of either a nutrient Agar or nutrient broth media?

Answer 6

They facilitate the growth of a wide variety of microbes

Question 7

Explain why nutrient Agar or nutrient broth media would be good media choices when collecting microbial specimens from environmental samples

Answer 7

They encourage a variety of bacteria to grow, and there is no preference to microbe type.

Question 8

What are some ways microbes can be differentiated on general purpose media, such as nutrient Agar or nutrient broth?

Answer 8

Typically one can differentiate by identifying growth patterns.