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Question

The process that involves the fusion of membrane of vesicle with the plasma membrane to extrude vesicle contents to the surrounding medium is called as

A
Endocytosis
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B
Exocytosis
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C
Pinocytosis
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D
Phagocytosis
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Solution

The correct option is C Exocytosis

Endocytosis is a process in which cells engulf molecules. Cells use this mechanism, when the molecules are larger and polar hence, cannot pass through hydrophobic cell membrane. The process shows engulfment of small food particles by forming an invagination around it then forming a small vesicle. This vesicle is then taken inside the cell and then vesicle is broken down to release the food particle. Pinocytosis is a process in which fluid is taken inside the cell by enclosing pseudopods around it. Phagocytosis is one of the type of endocytosis. Exocytosis is a process in which the vesicle containing particle is formed inside the cell, which then release the contents outside the cell by fusion of cell membrane and vesicular membrane.


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