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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
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
T. Decrease in peptidoglycan crosslinking
- a)P, Q and S only
- b)P, S and T only
- c)Q, R and S only
- d)P, R and T only
Correct answer is option 'C'. Can you explain this answer?
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Which of the following events occur during the stationary phase of bac...
The AbrB protein of the spore-forming bacterium Bacillus sabtilis is a repressor of numerous genes that are switched on during the transition from the exponential to the stationary phase of growth.The stationary phase is often due to a growth-limiting factor such as the depletion of an essential nutrient, and/or the formation of an inhibitory product such as an organic acid. Stationary phase results from a situation in which growth rate and death rate are equal. The number of new cells created is limited by the growth factor and as a result the rate of cell growth matches the rate of cell death. tely digested by lysozyme due to de-N-acetylation of glucosamine, which occurs on 17.3% of muropeptides. The cross-linking index of the polymer changes with the growth phase. It is highest in late stationary phase, with a value of 33.2 or 44% per muramic acid residue, as determined by reverse-phase high-pressure liquid chromatography or gel filtration Division should occur subsequent to carbon source exhaustion. For example, an approximately two fold increase in cell number has been reported during the first part of stationary phase for both Beneckea natriegens and Escherichia coli (Wade, 1952; Nazly et al.., 1980). The increase in cell number in the stationary phase consequently leads to a reduction in the cell size (Henrici. Growth rate of bacterial cells nearly equals their death rate
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Which of the following events occur during the stationary phase of bac...
During the stationary phase of bacterial growth, several events occur. Let's examine each option to determine which events are associated with this phase.
P. Rise in cell number stops: This event occurs during the stationary phase. After a period of exponential growth, the bacterial population reaches a maximum and the rate of cell division decreases or stops.
Q. Spore formation in some Gram-positive bacteria such as Bacillus subtilis: Spore formation typically occurs in response to unfavorable conditions, such as nutrient depletion or environmental stress. It is not specific to the stationary phase and can occur at any stage of bacterial growth.
R. Cell size increases in some Gram-negative bacteria such as Escherichia coli: Cell size can increase during the stationary phase, but it is not a defining characteristic of this phase. It can also occur during other growth phases.
S. Growth rate of bacterial cells nearly equals their death rate: This event occurs during the stationary phase. At this stage, the growth rate of bacterial cells slows down and approaches the death rate, resulting in a stable population size.
T. Decrease in peptidoglycan crosslinking: Peptidoglycan crosslinking refers to the strengthening of the cell wall in bacteria. This event is not specifically associated with the stationary phase and can occur at any stage of bacterial growth.
Based on the above analysis, the events that occur during the stationary phase of bacterial growth are:
- Rise in cell number stops (P)
- Growth rate of bacterial cells nearly equals their death rate (S)
Therefore, the correct answer is option C: Q, R, and S only.
P. Rise in cell number stops: This event occurs during the stationary phase. After a period of exponential growth, the bacterial population reaches a maximum and the rate of cell division decreases or stops.
Q. Spore formation in some Gram-positive bacteria such as Bacillus subtilis: Spore formation typically occurs in response to unfavorable conditions, such as nutrient depletion or environmental stress. It is not specific to the stationary phase and can occur at any stage of bacterial growth.
R. Cell size increases in some Gram-negative bacteria such as Escherichia coli: Cell size can increase during the stationary phase, but it is not a defining characteristic of this phase. It can also occur during other growth phases.
S. Growth rate of bacterial cells nearly equals their death rate: This event occurs during the stationary phase. At this stage, the growth rate of bacterial cells slows down and approaches the death rate, resulting in a stable population size.
T. Decrease in peptidoglycan crosslinking: Peptidoglycan crosslinking refers to the strengthening of the cell wall in bacteria. This event is not specifically associated with the stationary phase and can occur at any stage of bacterial growth.
Based on the above analysis, the events that occur during the stationary phase of bacterial growth are:
- Rise in cell number stops (P)
- Growth rate of bacterial cells nearly equals their death rate (S)
Therefore, the correct answer is option C: Q, R, and S only.
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Which of the following events occur during the stationary phase of bacterial growth?P. Rise in cell number stopsQ. Spore formation in some Gram-positive bacteria such as Bacillus subtilisR. Cell size increases in some Gram-negative bacteria such as Escherichia coliS. Growth rate of bacterial cells nearly equals their death rateT. Decrease in peptidoglycan crosslinkinga)P, Q and S onlyb)P, S and T onlyc)Q, R and S onlyd)P, R and T onlyCorrect answer is option 'C'. Can you explain this answer?
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Which of the following events occur during the stationary phase of bacterial growth?P. Rise in cell number stopsQ. Spore formation in some Gram-positive bacteria such as Bacillus subtilisR. Cell size increases in some Gram-negative bacteria such as Escherichia coliS. Growth rate of bacterial cells nearly equals their death rateT. Decrease in peptidoglycan crosslinkinga)P, Q and S onlyb)P, S and T onlyc)Q, R and S onlyd)P, R and T onlyCorrect answer is option 'C'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about Which of the following events occur during the stationary phase of bacterial growth?P. Rise in cell number stopsQ. Spore formation in some Gram-positive bacteria such as Bacillus subtilisR. Cell size increases in some Gram-negative bacteria such as Escherichia coliS. Growth rate of bacterial cells nearly equals their death rateT. Decrease in peptidoglycan crosslinkinga)P, Q and S onlyb)P, S and T onlyc)Q, R and S onlyd)P, R and T onlyCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following events occur during the stationary phase of bacterial growth?P. Rise in cell number stopsQ. Spore formation in some Gram-positive bacteria such as Bacillus subtilisR. Cell size increases in some Gram-negative bacteria such as Escherichia coliS. Growth rate of bacterial cells nearly equals their death rateT. Decrease in peptidoglycan crosslinkinga)P, Q and S onlyb)P, S and T onlyc)Q, R and S onlyd)P, R and T onlyCorrect answer is option 'C'. Can you explain this answer?.
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