click below
click below
Normal Size Small Size show me how
MicrobiologyLab24
Questions about "Catalase and Oxidase Production"
Question | Answer |
---|---|
________ is a respiratory enzyme found in most aerobic organisms. It is tested for by the addition of the chemical reagent ________ ________. | Catalyase, hydrogen peroxide |
The catalase test is especially valuable in distinguishing between the Gram-positive cocci ________(catalase +) and ________(catalase -) and in distinguishing between the Gram-negative long rods ________(catalase +) and ________(catalase -). | Staphylococcus (catalase +) Streptococcus (catalase -) Bacillus (catalase +) Clostridium (catalase -) |
________ organisms do not produce catalase and are poisoned by the accumulation of hydrogen peroxide. | Anaerobic |
An obligate anaerobe would be expected to give a ________ test for oxidase. | negative |
A ________ color appears in a positive oxidase test. | dark purple |
The chemical ________________ is added to test for the production of oxidase. | tetramethyl-para-phenylenediamine HCl (Kovac's oxidase reagent) |
A positive oxidase test depends upon the presence of absence of ________ in the cell. | c type cytochromes |
True or false: Oxidase production has no value in classification. | False. |