A. Cortex and spore coat formation
B. Maturation and release of endospore
C. DNA replication and axial filament formation
D. Engulfment of forespore
E. Asymmetric septum formation
Choose the correct answer from the options given below :
Endospore Formation Steps Explained
The formation of bacterial endospores (sporulation) is a complex process involving several distinct stages. Arranging these stages correctly is crucial for understanding bacterial survival mechanisms.
Correct Sequence of Endospore Formation
The correct order of the steps for endospore formation is: C, E, D, A, B.
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Step C: DNA replication and axial filament formation
The process begins with the replication of the bacterial DNA. The replicated chromosomes migrate to opposite poles of the cell, forming axial filaments.
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Step E: Asymmetric septum formation
An asymmetric septum (a dividing wall) forms within the cell, separating the replicated DNA and a small amount of cytoplasm to form the pre-spore (forespore).
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Step D: Engulfment of forespore
The larger mother cell membrane then engulfs the forespore, enclosing it within the cell.
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Step A: Cortex and spore coat formation
Peptidoglycan layers form between the two membranes, creating the cortex. Protective layers known as the spore coat develop around the cortex.
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Step B: Maturation and release of endospore
The endospore fully matures, becoming resistant to environmental stress. Finally, the mother cell lyses (breaks down), releasing the free endospore.
Final Answer Derivation
By following the biological sequence of events, the correct order is determined to be C → E → D → A → B, which corresponds to Option D.
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- Kalpsutra, the illustrated canonical text is from:-
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- Mohandas Karamchand Gandhi launched quit India movement after the failure of:-
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- Who among the following was not a member of the constituent assembly:-
