In the image below, the tube to the far left is for acid and for gas.

What reagent makes Pseudomonas Isolation agar differential?

A bacterium is inoculated on Pseudomonas Isolation Agar and is visible under normal light.  What pigment is visible on the plate?

A bacterium is inoculated on Pseudomonas Isolation Agar and is visible under normal light.  What pigment is visible on the plate?

What can you conclude about the culture tested on the top right?

In the nitrate reduction test, you add reagent A and B and see no color change.  You then add Zn, and still observe no color change.  The most likely explanation:

Staphylococcus aureus and Serratia marcescens are inoculated on DNAse Agar. What can you tell about this strain of Staphylococcus aureus ?

The enzyme nitrate reductase is associated with which term below?

The enzyme nitrate reductase is associated with which term below?

What can you conclude about the culture tested on the top left?