NURSING EXAM QUESTIONS
MICROBIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It is a sticky layer that makes the bacteria more pathogenic (disease causing)
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It helps the bacteria move
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It is used to transfer DNA between two different bacteria
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It is a selective layer that lets certain molecules enter or exit the cell
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Detailed explanation-1: -The ‘stickiness’ of the capsule promotes cell adhesion to surfaces, a survival advantage. In addition, the capsule protects the cell from phagocytosis. The ‘slipperiness’ of the capsule hinders the uptake of the bacteria by phagocytic cells.
Detailed explanation-2: -4.1. The bacterial capsule is also considered a virulence factor as it enhances the ability of bacteria to cause disease by preventing phagocytosis.
Detailed explanation-3: -Because they are made from human molecules, capsules are not detected by the immune system, so they conceal the bacterial antigens that the immune system would usually recognize and attack. Therefore, capsules make pathogenic bacteria invisible to the immune system.
Detailed explanation-4: -Capsules make the bacterial surface constituents slippery. Allowing germs to adhere to surfaces and hide from the immune system by mimicking host tissues, Making them resistant to complementing their invasiveness. The capsule protects the cell from desiccation and harmful byproducts.
Detailed explanation-5: -Capsules can protect a bacterial cell from ingestion and destruction by white blood cells (phagocytosis). While the exact mechanism for escaping phagocytosis is unclear, it may occur because capsules make bacterial surface components more slippery, helping the bacterium to escape engulfment by phagocytic cells.