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Questions and Answers
How do bacteria reproduce?
How do bacteria reproduce?
- Via conjugation
- By mitosis
- Through meiosis
- By simple binary fission (correct)
What is the main form of bacterial growth seen in the laboratory?
What is the main form of bacterial growth seen in the laboratory?
- Development of colonies on solid media (correct)
- Formation of spores
- Transformation of a liquid medium to a solid form
- Transformation of solid media to liquid suspension
What is the purpose of the mesosome during bacterial reproduction?
What is the purpose of the mesosome during bacterial reproduction?
- Generation of energy for replication
- Attachment of the duplicated chromosome to the cytoplasmic membrane (correct)
- Providing structure to the cell wall
- Regulating the temperature for optimal growth
What happens when a transverse septum is formed during binary fission?
What happens when a transverse septum is formed during binary fission?
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What distinguishes the daughter cells generated from binary fission?
What distinguishes the daughter cells generated from binary fission?
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Study Notes
Bacterial Reproduction
- Bacteria primarily reproduce through binary fission, a process whereby a single cell divides into two identical daughter cells.
- In binary fission, the bacterial chromosome replicates, and the cell elongates before splitting.
Main Form of Bacterial Growth
- In laboratory settings, the primary form of bacterial growth observed is exponential or logarithmic growth.
- This growth phase occurs when conditions are favorable, allowing bacteria to double in number at a constant rate.
Role of Mesosome
- Mesosomes are invaginations of the bacterial cell membrane that function during DNA replication and cell division.
- They help in the separation of chromosomes and are thought to aid in the anchoring of chromosomal material.
Formation of Transverse Septum
- A transverse septum forms during binary fission when the cell membrane begins to invaginate, leading to the division of the cytoplasm.
- This septum eventually divides the parent cell into two separate but genetically identical daughter cells.
Distinguishing Daughter Cells
- Daughter cells generated from binary fission are genetically identical to the parent cell, maintaining the same genetic material.
- While they may be identical in genetic composition, they can vary in size and metabolic activity due to environmental influences after division.
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