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Question

The process by which a cell secretes macro-molecules through fusion of transport vesicle to the plasma membrane is called ___________.


  1. Exocytosis

  2. Pinocytosis

  3. Phagocytosis

  4. Endocytosis


Solution

The correct option is A

Exocytosis


The movement of macromolecules such as proteins or polysaccharides into or out of the cell is called bulk transport. There are two types of bulk transport, exocytosis and endocytosis, and both require the expenditure of energy (ATP). In exocytosis, materials are exported out of the cell via secretory vesicles. In this process, the Golgi complex packages macromolecules into transport vesicles that travel to and fuse with the plasma membrane.

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