Using Moeller's decarboxylase base medium, what color is a positive reaction and what causes this color to be produced?
A) Purple, alkaline environment produced
B) Yellow, acid environment produced
C) Purple, acid environment produced
D) Yellow, alkaline environment produced

Question

Quizplus · Accepted Answer

A positive reaction in Moeller's decarboxylase base medium results in a purple color due to the production of an alkaline environment. This occurs when the organism being tested decarboxylates an amino acid, producing amines that raise the pH of the medium.

Using Moeller's Decarboxylase Base Medium, What Color Is a Positive