Question

Arrange the phases of bacterial growth in correct order:
A. Stationary phase
B. Lag phase
C. Log (exponential) phase
D. Death phase
E. Inoculation into fresh medium
Choose the correct answer from the options given below:

• A. A, E, C, B, D
• B. A, C, E, B, D
• C. E, B, A, D, C
• D. E, B, C, A, D

Hint:

Remember: Lag → Log → Stationary → Death.

Answer 1

The Correct Option is D

Concept: Bacterial growth follows a characteristic sequence of phases when cultured in a fresh medium.

Step 1: Understanding each phase.
• Inoculation (E): Introduction of microorganisms into fresh medium
• Lag phase (B): Adaptation period with little or no division
• Log phase (C): Rapid exponential growth
• Stationary phase (A): Growth rate equals death rate
• Death phase (D): Decline in population

Step 2: Arranging logically.
The sequence is: \[ E \rightarrow B \rightarrow C \rightarrow A \rightarrow D \]

Step 3: Matching options.
Option (4) matches the correct sequence. Final Conclusion:
Correct order is E, B, C, A, D.