5.9 Phenylalanine Deaminase Test

Question 1

A yellow reaction in the phenylalanine deaminase test indicates that the organism is:

Answer 1

-negative for phenylalanine deaminase

Question 2

What is deamination?

Answer 2

-removal of the amine group`

Question 3

What is the role of ferric chloride in the phenylalanine deaminase test?

Answer 3

-It reacts with phenylpyruvic acid to produce a green color.

Question 4

The formation of a dark green product when ferric chloride is added to a culture incubated in Phenylalanine deaminase test medium, indicates the presence of:

Answer 4

-Phenylpyruvic acid.

Question 5

The enzyme that functions to remove the amino group from the amino acid phenylalanine is called:

Answer 5

-Phenylalanine deaminase

Question 6

In the phenylalanine deaminase test, what does a negative result suggest about the organism being tested?

Answer 6

-It cannot metabolize phenylalanine.

Question 7

A green reaction in the phenylalanine deaminase test indicates that the organism is:

Answer 7

-Positive for phenylalanine deaminase.

Question 8

In the phenylalanine deaminase test, the medium used comes in the form of a:

Answer 8

-Slant