Catalase Activity Flashcards
1
Q
Would you expect oxidase-positive organisms to be catalase positive as well, why?
A
Yes both get rid of oxygen free radicals
2
Q
What is the substrate for catalase
A
Hydrogen peroxide
3
Q
What reaction occurs
A
H2o2➡️2h2o + o2
4
Q
What other type of enzyme besides catalase breaks down h2o2
A
Peroxidase
5
Q
Why can the catalase test not be performed on colonies from a blood agar plate
A
You would get a false positive because catalase is already in blood
6
Q
Why is h2o2 toxic
A
Breaks down into oxygen free radicals
