Sporulation in bacteria occurs in which one of the following growth phase?
A. Lag phaseB. Stationary phase
C. Log phase
D. Phase of decline
Ans. B. Stationary Phase
Phases
of Bacterial growth cycle:
1.
During lag phase, bacteria adapt
themselves to growth conditions. It is the period where the individual bacteria
are maturing and not yet able to divide. During the lag phase of the bacterial
growth cycle, synthesis of RNA, enzymes and other molecules occurs. 2. Exponential phase (log phase or the logarithmic phase) is a period characterized by cell doubling. The number of new bacteria appearing per unit time is proportional to the present population.
3. During stationary phase, the growth rate slows as a result of nutrient depletion and accumulation of toxic products. This phase is reached as the bacteria begin to exhaust the resources that are available to them. This phase is a constant value as the rate of bacterial growth is equal to the rate of bacterial death Sportulation occurs here.
4. At death phase, bacteria rim out of nutrients and die.
