I the answer correct because of the presence of bubbles? preting biochemical tes

Question

I the answer correct because of the presence of bubbles?

preting biochemical test results t A own specimen. Observe the pictured result and answer the following question. View the image in greater detail. Select ALL appropriate statements regarding the pictured Catalase test result The organism tested is protected against oxygen radi The catalase test can be used to identify genus and species of a test organism The organism tested is probably an aerobe or a facultative anaerobe The image shows a positive test result. The image shows a negative test result. cals Submit My Answers Give Up

Explanation / Answer

Answer: (a), (c) and (d) are correct

(a) The organism tested is protected against oxygen radicals.

(c) The organism tested is probably an aerobe or a facultative anaerobe.

(d) The image shows a positive test result.

Explanation:

Catalase test is a test to detect the presence of the enzyme catalase that release oxygen (gas bubbles) from hydrogen peroxide. It is used to differentiate between Staphylococci (catalase positive) and Streptococci (catalase negative). Catalase positive bacteria can be aerobes or facultative anaerobes.

Catalase protects the cells from the harmful effects of ROS (reactive oxygen species).

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