The color indicator in thioglycolate tubes that turns pink when oxygen is present is: Group of answer choices acetoin phenol red resazurin methylene blue
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Thioglycolate tubes are used to determine the oxygen requirements of microorganisms. Show more…
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In FTB, resazurin is present throughout the medium (True/False). Resazurin act as a(n)__ __. The top of the media is pink only, it indicates that top media only is ____ not the rest of the media. True, oxygen indicator, reduced. False, oxygen indicator, reduced. True, oxygen indicator, oxidized. True, carbon dioxide indicator, oxidized.
Adi S.
QUESTION 12 Is the pH indicator in Simmons citrate agar phenol red, sodium chloride, bromothymol blue, and methyl red? QUESTION 13 At pH 7.6 and above, bromothymol blue is (color). QUESTION 14 Phenylpyruvic acid with FeCl3 shows the following colors, which indicate positive results: - Pink - Yellow - Clear (no color) - Green
10. Which pH indicator detects the alkalize medium upon the release of ammonia once bacteria metabolize citrate in Simmons citrate agar? A. phenylenediamine B. methyl red C. bromothymol blue D. phenol red E. ferrous sulfate 11. Which of the following is an INCORRECT statement regarding carbohydrate fermentation testing? A. The presence of a gas bubble in the Durham tube indicates the lactic acid production. B. Different end products are formed as a result of glucose degradation, depending on the microorganism inoculated. C. The change in color of the medium occurs when the phenol red indicator detects acid production. D. In order to obtain accurate test results, it is imperative that all cultures be observed within 48 hours. E. None of the answer choices.
Madhur L.
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