Question:
The maximum growth rate is seen in .......... phase
The maximum growth rate is seen in .......... phase
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Exponential phase = fastest cell division phase.
Updated On: Jul 18, 2026
- Lag phase
- Exponential phase
- Stationary phase
- Senescence phase
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The Correct Option is B
Solution and Explanation
Step 1: Understanding growth curve.
Population or cell growth follows a sigmoid curve with different phases: lag, exponential, stationary, and senescence. Each phase has distinct growth characteristics.
Step 2: Lag phase characteristics.
In lag phase, cells adapt to environment but show minimal growth. Metabolic activity prepares the system for division but growth rate remains low.
Step 3: Exponential phase features.
In exponential phase, cells divide at maximum possible rate. Nutrients are abundant and environmental conditions are optimal, leading to rapid population increase.
Step 4: Stationary phase.
In stationary phase, growth rate equals death rate due to nutrient depletion. Hence no net increase occurs.
Step 5: Senescence phase.
In senescence phase, cells age and die, leading to decline in population. Growth rate becomes negative.
Step 6: Final conclusion.
Thus, maximum growth rate is observed in the exponential phase.
Population or cell growth follows a sigmoid curve with different phases: lag, exponential, stationary, and senescence. Each phase has distinct growth characteristics.
Step 2: Lag phase characteristics.
In lag phase, cells adapt to environment but show minimal growth. Metabolic activity prepares the system for division but growth rate remains low.
Step 3: Exponential phase features.
In exponential phase, cells divide at maximum possible rate. Nutrients are abundant and environmental conditions are optimal, leading to rapid population increase.
Step 4: Stationary phase.
In stationary phase, growth rate equals death rate due to nutrient depletion. Hence no net increase occurs.
Step 5: Senescence phase.
In senescence phase, cells age and die, leading to decline in population. Growth rate becomes negative.
Step 6: Final conclusion.
Thus, maximum growth rate is observed in the exponential phase.
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