Question

multiple choice question

which of the following characterizes the lag phase of a normal bacterial growth curve?

exponential decline in cell numbers
depletion of nutrients and build up of waste
little increase in cell numbers
logarithmic cell division

Explanation:

Define the lag phase of bacterial growth

The lag phase is the initial period in a bacterial growth curve where cells are adjusting to their new environment, synthesizing enzymes, and increasing in size, but not yet actively dividing.

Evaluate the given options

• Exponential decline in cell numbers: This describes the death (decline) phase.
• Depletion of nutrients and build up of waste: This leads to the stationary phase and subsequent death phase.
• Little increase in cell numbers: This correctly characterizes the lag phase, as there is intense metabolic activity but virtually no cell division.
• Logarithmic cell division: This describes the log (exponential growth) phase.

Answer:

• Exponential decline in cell numbers
• Depletion of nutrients and build up of waste
• Little increase in cell numbers (Correct answer)
• Logarithmic cell division