Lab 14

Question 0

What is MRVP test

Answer 0

Distinguishes organisms that produce acid from glucose or neutral production = acetoin.

Question 1

What is the fermentation tube

Answer 1

Contains phenol red. Detects acid and gas production from carbohydrates

Question 2

What happens if it’s a positive MR test

Answer 2

It remains red. The ph = below 4.4

Question 3

If the MR test is orange red

Answer 3

The ph 4.4-6.0

Question 4

What happens if the MR test is yellow

Answer 4

Ph above 6.0

Question 5

If acetoin is present

Answer 5

The upper part: turns red

Negative: light brown

Question 6

What happens to citrate agar if it’s a positive test

Answer 6

Changes to blue

Question 7

What bacteria is used in the lab

Answer 7

E. Coli
E. Aerogenes
A. Faecalis
P. Vulgaris

Question 8

P. Vulgaris ferments what?

Answer 8

Glucose and sucrose