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Which of the following events occur during the stationary phase of bacterial growth?
P. Rise in cell number stops
Q. Spore formation in some Gram-positive bacteria such as Bacillus subtilis
R. Cell size increases in some Gram-negative bacteria such as Escherichia coli
S. Growth rate of bacterial cells nearly equals their death rate
T. Decrease in peptidoglycan crosslinking
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- P, Q and S only
- P, S and T only
- Q, R and S only
- P, R and T only
Correct Option: A
Stationary phase of Bacterial growth characterises of cell size increase of certain gram +ve bacteria, cell divion is halted, spore formation occurs in gram +ve bacteria and the growth rate becomes equal to the death rate owing to nutrient limitation, spore formation, starvation util and unless the culture is stirred. Peptidogylcan cross linking is also remarkably reduced.
