Figure 7.1

A suspension of 10⁶ Bacillus cereus endospores was put in a hot-air oven at 170°C.Plate counts were used to determine the number of endospores surviving at the time intervals shown.
-In Figure 7.1,the thermal death point for this culture is
A)15 minutes.
B)50°C.
C)30 minutes.
D)170°C.
E)The answer cannot be determined based on the information provided

Question

Figure 7.1
  
A suspension of 10⁶ Bacillus cereus endospores was put in a hot-air oven at 170°C.Plate counts were used to determine the number of endospores surviving at the time intervals shown.
-In Figure 7.1,the thermal death point for this culture is
A)15 minutes. 
B)50°C. 
C)30 minutes. 
D)170°C. 
E)The answer cannot be determined based on the information provided

Quizplus · Accepted Answer

The thermal death point is the lowest temperature at which all microorganisms in a liquid suspension are killed in 10 minutes. Without specific data or a graph showing the temperature and time required to kill the microorganisms, the thermal death point cannot be determined.

Figure 7.1 a Suspension of 10⁶ Bacillus Cereus Endospores Was Put in Cereus