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Functions of Golgi Body

The golgi body's chief function is secretion of macromolecules outside the cell. Materials received from the endoplasmic reticulum are chemically modified in the golgi body, such as through glycosylation. The modified materials are then packaged into vesicles that pinch off from the trans face of the golgi body and are discharged outside the cell. The golgi body also synthesizes cell wall materials, forms the cell plate during cell division, and contributes to formation of lysosomes, gametes, egg membranes, and hormone secretion by glands.

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232 views1 page

Functions of Golgi Body

The golgi body's chief function is secretion of macromolecules outside the cell. Materials received from the endoplasmic reticulum are chemically modified in the golgi body, such as through glycosylation. The modified materials are then packaged into vesicles that pinch off from the trans face of the golgi body and are discharged outside the cell. The golgi body also synthesizes cell wall materials, forms the cell plate during cell division, and contributes to formation of lysosomes, gametes, egg membranes, and hormone secretion by glands.

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samy g
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FUNCTIONS

[1) Cell Secretion :

Chief function of golgi body is secretion (export) of macromolecules.

Secretion involves three steps:

Golgi body receives the materials from E.R. through its dis - face.

These materials are chemically modified by golgi body. (For e.g . Glycosidation (glycosylation) of
proteins and lipids takes place in golgi body and it yields glycoproteins and glycolipids.

After chemical modifications materials are packed in vesicles. These vesicles are pinched off from
trans-face of golgi body and discharged outside the cell (Reverse pinocytosis).

The golgi apparatus principally performs the function of packaging materials, to be delivered either
to the intracellular targets or secreted outside the cell Materials to be packaged in the form of
vesicles from the ER fuse with the cis face of the golgi apparatus and move towards the maturing
face. This explains, why the golgi apparatus remains in close association with the endoplasmic
reticulum. A number of proteins synthesised by ribosomes on the endoplasmic reticulum are
modified in the cisternae of the golgi apparatus before they are released from its trans face. Golgi
apparatus is the important site of formation of glycoproteins and glycolipids.

All the macromolecules which are to be sent outside the cell, move through the golgi body. So golgi
body is termed as "Director of macromolecular traffic in cell" or middlemen of cell.

2). Synthesis of cell wall Material (Polysaccharide synthesis).

3). Cell plate formation (Phragmoplast) during cell formation

4). Formation of acrosome during spermiogenesis. (Formation of male gametes)

5). Vitelline membrane of egg is secreted by golgi body.

6). Formation of Lysosome = It is collective function of golgi body and E.R.

7). Secretion of hormones by glands.

8). To carry out membrane transformations—The membranes of secretory vesicles are similar to
plasma membrane. These are constantly incorporated into the membrane when they discharge the
contents, adding new stretches to the membrane.

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