Question

0.5 points Select all true statements regarding hydrogen sulfide production in TSIA: Hydrogen sulfide production occurs under acidic, aerobic conditions It is possible to have hydrogen sulfide production for an obligate aerobic organism When hydrogen sulfide production occurs, it is important to look at the corresponding phenol red carbohydrates, as $H_2S$ may obscure enough of the tube to make determination of lactose/sucrose difficult Hydrogen sulfide production occurs under basic, anaerobic conditions Darkening at the surface of the TSIA slant is indicative of $H_2S$ production It is possible to have hydrogen sulfide production for an asaccharolytic organism Hydrogen sulfide production occurs under acidic, anaerobic conditions

          0.5 points
Select all true statements regarding hydrogen sulfide production in TSIA:
Hydrogen sulfide production occurs under acidic, aerobic conditions
It is possible to have hydrogen sulfide production for an obligate aerobic organism
When hydrogen sulfide production occurs, it is important to look at the corresponding
phenol red carbohydrates, as $H_2S$ may obscure enough of the tube to make determination of
lactose/sucrose difficult
Hydrogen sulfide production occurs under basic, anaerobic conditions
Darkening at the surface of the TSIA slant is indicative of $H_2S$ production
It is possible to have hydrogen sulfide production for an asaccharolytic organism
Hydrogen sulfide production occurs under acidic, anaerobic conditions

0.5 points
Select all true statements regarding hydrogen sulfide production in TSIA:
Hydrogen sulfide production occurs under acidic, aerobic conditions
It is possible to have hydrogen sulfide production for an obligate aerobic organism
When hydrogen sulfide production occurs, it is important to look at the corresponding
phenol red carbohydrates, as H2S may obscure enough of the tube to make determination of
lactose/sucrose difficult
Hydrogen sulfide production occurs under basic, anaerobic conditions
Darkening at the surface of the TSIA slant is indicative of H2S production
It is possible to have hydrogen sulfide production for an asaccharolytic organism
Hydrogen sulfide production occurs under acidic, anaerobic conditions

Added by Josefa R.

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