Question
Question 1
When performing the urease test, which of the following color changes is expected if the organism is
positive for urease production?
Answers:
The agar changes from yellow to bright pink
The agar changes from red to yellow
The agar changes from blue to green
The agar changes from colorless to black
Question 2
The oxidase test determines the presence of cytochrome oxidase enzyme. This enzymes functions as
part of _____________
Answers:
The electron transport chain
Glycolysis
The citric acid cycle
Fermentation
Question 3
Genotypic identification methods examine the DNA sequence of an organism
Answers:
True
False
Question 4
Which of the following would be most valuable to confirm the identification of microorganisms
isolated during a food poisoning outbreak?