A) stationary phase
B) senescent phase
C) lag phase
D) exponential phase
Correct Answer: A
Solution :
Maximum growth rate occurs in lag phase. At this stage microbes follows an exponential growth rate cell divides in multiple of two and follows geometric progression. Lag phase is the preparatory phase when the cell prepares itself for cell division, in stationary phase rate of death of cells and rate of division of cells is same. Secondary metabolites began to accumulate at this stage. Senescent phase is the death phase.
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