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Which one of the following combinations is mismatched?
- a)Glycocalyx - may be capsule or slime layer
- b)Pili - Reproduction
- c)Cell wall - Protective, determines shape, prevents from bursting
- d)Flagella, Pili and Fimbriae - Surface structures of bacterial cell
Correct answer is option 'B'. Can you explain this answer?
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Which one of the following combinations is mismatched?a)Glycocalyx - ...
Pili is on the surface of the bacteria used for locomotion or to form a connection between bacteria for reproduction. Hence the answer is option B.
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Which one of the following combinations is mismatched?a)Glycocalyx - ...
Mismatched Combination:
Option B: Pili - Reproduction
Explanation:
Pili are hair-like structures present on the surface of bacterial cells. They are also known as fimbriae. Pili are not involved in reproduction, rather they play a role in the following functions:
- Attachment: Pili help bacteria to attach to surfaces or host cells.
- Conjugation: Some bacteria use pili to transfer genetic material between cells through a process called conjugation.
The correct function of reproduction in bacteria is achieved through binary fission, which is the process of cell division in which one cell divides into two identical daughter cells. Hence, option B is a mismatched combination.
Other Combinations:
Option A: Glycocalyx - may be capsule or slime layer
- Glycocalyx is a layer of polysaccharides that surrounds the bacterial cell.
- It can be of two types: capsule or slime layer.
- Capsule is a thick, organized layer of glycocalyx that helps bacteria to evade the host immune system.
- Slime layer is a thin, unorganized layer that helps bacteria to attach to surfaces and protect from desiccation.
Option C: Cell wall - Protective, determines shape, prevents from bursting
- Cell wall is a rigid, protective layer that surrounds the bacterial cell membrane.
- It determines the shape of the bacterial cell and prevents it from bursting due to osmotic pressure.
- The composition of cell wall varies among different bacterial species. Gram-positive bacteria have a thick peptidoglycan layer, while Gram-negative bacteria have a thin peptidoglycan layer surrounded by an outer membrane.
Option D: Flagella, Pili and Fimbriae - Surface structures of bacterial cell
- Flagella, pili, and fimbriae are surface structures present on the bacterial cell.
- Flagella are long, whip-like structures that help bacteria to move towards nutrients or away from harmful substances.
- Pili and fimbriae are hair-like structures that help bacteria to attach to surfaces or host cells, and transfer genetic material between cells.
Option B: Pili - Reproduction
Explanation:
Pili are hair-like structures present on the surface of bacterial cells. They are also known as fimbriae. Pili are not involved in reproduction, rather they play a role in the following functions:
- Attachment: Pili help bacteria to attach to surfaces or host cells.
- Conjugation: Some bacteria use pili to transfer genetic material between cells through a process called conjugation.
The correct function of reproduction in bacteria is achieved through binary fission, which is the process of cell division in which one cell divides into two identical daughter cells. Hence, option B is a mismatched combination.
Other Combinations:
Option A: Glycocalyx - may be capsule or slime layer
- Glycocalyx is a layer of polysaccharides that surrounds the bacterial cell.
- It can be of two types: capsule or slime layer.
- Capsule is a thick, organized layer of glycocalyx that helps bacteria to evade the host immune system.
- Slime layer is a thin, unorganized layer that helps bacteria to attach to surfaces and protect from desiccation.
Option C: Cell wall - Protective, determines shape, prevents from bursting
- Cell wall is a rigid, protective layer that surrounds the bacterial cell membrane.
- It determines the shape of the bacterial cell and prevents it from bursting due to osmotic pressure.
- The composition of cell wall varies among different bacterial species. Gram-positive bacteria have a thick peptidoglycan layer, while Gram-negative bacteria have a thin peptidoglycan layer surrounded by an outer membrane.
Option D: Flagella, Pili and Fimbriae - Surface structures of bacterial cell
- Flagella, pili, and fimbriae are surface structures present on the bacterial cell.
- Flagella are long, whip-like structures that help bacteria to move towards nutrients or away from harmful substances.
- Pili and fimbriae are hair-like structures that help bacteria to attach to surfaces or host cells, and transfer genetic material between cells.
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Which one of the following combinations is mismatched?a)Glycocalyx - may be capsule or slime layerb)Pili - Reproductionc)Cell wall - Protective, determines shape, prevents from burstingd)Flagella, Pili and Fimbriae - Surface structures of bacterial cellCorrect answer is option 'B'. Can you explain this answer?
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