The mannitol in the Mannitol Salt Agar plate serves as a __________.

In the nitrate reduction test, sulfanilic acid and naphtylamine will combine with __________ to produce nitrous acid, which will result in a red color change.

If you are moving organisms from one medium to another and you allow microorganisms other than those found in the culture to contaminate the new media, it means that you have moved those microorganisms aseptically.

Cytochrome c oxidase is the last enzyme in its electron transport chain.

If the tubes remained clear after adding reagents A and B in a nitrate reduction test, and then you got the indicated result after adding zinc dust, it would mean __________.

The tube indicated contains broth from a MR-VP broth tube and __________.

A pH indicator is added to mannitol salt agar to allow for the detection of acid production. The pH indicator used in mannitol salt agar is __________.

Why is a Durham tube added to the phenol red fermentation broth tube?

The Voges-Proskauer test was designed to identify organisms capable of mixed acid fermentation.

It is important to read your oxidase test results right away because __________.