Question

Bacterial cell division by binary phase A. Cell elongation B. Chromosome replication C. New cell wall deposition D. Two daughter cells result Choose the correct answer from the options given below:

• A. A$\rightarrow$B$\rightarrow$C$\rightarrow$D
• B. B$\rightarrow$A$\rightarrow$C$\rightarrow$D
• C. C$\rightarrow$B$\rightarrow$D$\rightarrow$A
• D. D$\rightarrow$A$\rightarrow$B$\rightarrow$C

Hint:

Binary fission is an asexual mode of reproduction commonly seen in bacteria.

Answer 1

The Correct Option is B

Concept: Binary fission is the common method of reproduction in bacteria. It involves:
• DNA replication
• Cell growth
• Septum formation
• Formation of daughter cells

Step 1: Replication of chromosome occurs first. Initially: \[ \boxed{ \text{Bacterial DNA replicates} } \] This ensures genetic material is duplicated before division. Thus: \[ \boxed{B} \] comes first.

Step 2: Cell elongation occurs next. After replication:
• The bacterial cell enlarges.
• Replicated chromosomes move apart. Thus: \[ \boxed{A} \] comes second.

Step 3: Formation of septum and new wall occurs. Next:
• Plasma membrane invaginates.
• New cell wall is deposited. Thus: \[ \boxed{C} \] comes third.

Step 4: Two daughter cells are formed finally. At the end:
• Cell splits into two daughter cells. Thus: \[ \boxed{D} \] comes last.

Step 5: Write correct order. Therefore: \[ \boxed{ B \rightarrow A \rightarrow C \rightarrow D } \] Hence correct answer is: \[ \boxed{(2)} \] Final Conclusion: Binary fission follows: \[ \boxed{ \text{DNA replication} \rightarrow \text{Elongation} \rightarrow \text{Wall deposition} \rightarrow \text{Daughter cells} } \]