Question

The physiology of stationary-phase cells

a. depends on what caused the cessation of growth

b. is a general adaptation of cells to the nongrowth state

c. occurs only when carbon sources become growth limiting

d. all of the above

Answer 1

The physiology of stationary-phase cells is a general adaptation of cells to the nongrowth state. Cells switch to survival metabolism, becoming less susceptible to antibiotics and producing secondary metabolites. This phase is also associated with the expression of virulence factors in certain bacteria.

Step-by-step explanation:

The physiology of stationary-phase cells is option b: a general adaptation of cells to the nongrowth state. During the stationary phase, cells switch to a survival mode of metabolism, slowing the synthesis of peptidoglycans, proteins, and nucleic acids. They are less susceptible to antibiotics and may undergo sporulation or synthesize secondary metabolites like antibiotics. In some bacteria, the stationary phase is associated with the expression of virulence factors.

Answer 2

The physiology of stationary-phase cells depends on what caused the cessation of growth.

Option: (a)

Step-by-step explanation:

• In the physiology of stationary phase the cells then becomes spherical and later it transforms into smaller rigid cell envelop.
• The walls surrounded by the cell wall are highly crossed-linked, next the 'fluidity of the membrane reduces gradually', and there is a response given by the stringent response mechanism.
• The response is given for a certain purpose in order to survive the calamity.