Question | Answer |
X is a respiratory enzyme found in most aerobic organisms. It is tested for by the addition of the chemical reagent X. | Catalase, hydrogen peroxide |
The catalase test is especially valuable in distinguishing between the gram (+) cocci X, and X, and in distinguishing between the gram (+) long rods X, and X. | Staphylococcus (catalase +)
Streptococcus (catalase - )
Bacillus (catalase +)
clostridium (catalase -) |
X organisms do not produce catalase and are poisoned by the accumulation of hydrogen peroxide. | Anaerobic |
An obligate anaerobe would be expected to give a X test for oxidase. | negative |
A X color appears in a positive oxidase test. | deep purple |
The chemical X is added to test for the production of oxidase. | tetramethyl-para-phenylenediamine |
A positive oxidase test depends upon the presence or absence of X in the cell. | cytochromes c |
Oxidase production has no value in classification. T or F | False |
X reagent tests to see if an organism is catalase positive: | hydrogen peroxide |
Positive catalase test means that: | catalase was produced by the organism |
X reagent tests to see if an organism is oxidase positive | Kovac's oxidase reagent |
Positive oxidase test means that: | an aerobic organism with c type cytochrome, can oxidize certain amines |