Question

2. How did increase the incubation temperature of thecontrolled environment from 10°C to 15°C affect the SACwhen Bacteria P cells were exposed to an 0₂, concentrationof 15% and a pH of 9 ? When the incubation temperaturewas increased from 10°C to 15°C, the SAC:F. 'increased; the SAC for Trial 10 was 7% and the SACfor Trial 4 was 9%.G. increased; the SAC for Trial 5 was 9% and the SAC forTrial 11 was 15%.H. decreased; the SAC for Trial 10 was 9% and the SACfor Trial 4 was 7%.J. decreased; the SAC for Trial 5 was 15% and the SACfor Trial 11 was 9%.

Answer 1

To determine how the temperature change affects the bacteria SAC when they were exposed to a 15% concentration of O₂ and a pH of 9, you have to compare the SAC of both trials:

Trial 5

Temperature 10ºC, O₂= 15%, pH= 9, SAC 15%

Trial 11

Temperature 15ºC, O₂= 15%, pH= 9, SAC 9%

As you can see, for trial 5 the SAC was 15%, but for trial 11 the SAC was 9%, which means that the surface area coverage of bacteria P decreases when the incubation temperature increases.

The correct option is J.