Question

Halfway through exponential phase, the temperature is lowered slightly below the

optimum. How will the growth curve change?

A. The cells will immediately enter death phase

B. The cells will enter lag phase

C.The slope of the exponential phase will become shallower

D. The slope of the exponential phase will become more steep

Which one is the best answer ? Choose only one answer

Answer 1

B. The cells will enter lag phase

Step-by-step explanation:

There are four identifiable phases of bacterial growth in a culture. These are: the lag phase, the exponential or log phase, the stationary phase, and the death or decline phase.

The lag phase occurs when there is need for the growing bacterial cells to adapt to new conditions. The adaptation period, i a time when the cells adjust themselves to the new conditions. The length of the lag phase varies considerably, depending on the initial and final conditions of the bacteria cells.

Hence, when the temperature is slightly lowered below the optimum halfway into the exponential phase, the cells will enter into lag phase