English Deutsch Français Italiano Español Português 繁體中文 Bahasa Indonesia Tiếng Việt ภาษาไทย
All categories

2006-11-25 18:26:44 · 9 answers · asked by Anonymous in Science & Mathematics Biology

9 answers

http://en.wikipedia.org/wiki/Golgi_complex

The primary function of the Golgi apparatus is to process and package macromolecules synethesised by the cell, primarily proteins and lipids. The Golgi apparatus forms a part of the endomembrane system present in eukaryotic cells.

2006-11-25 18:32:20 · answer #1 · answered by GinaValentina 2 · 0 0

Cells synthesise a large number of different macromolecules required for life. The Golgi apparatus is integral in modifying, sorting, and packaging these substances for cell secretion (exocytosis) or for use within the cell. It primarily modifies proteins delivered from the rough endoplasmic reticulum, but is also involved in the transport of lipids around the cell, and the creation of lysosome.

Enzymes within the cisternae are able to modify substances by the addition of carbohydrates (glycosylation) and phosphate (phosphorylation) to them. Proteins are also labelled with a signal sequence of molecules which determine their final destination. For example, the Golgi apparatus adds a mannose-6-phosphate label to proteins destined for lysosomes.

Vesicles which leave the rough endoplasmic reticulum are transported to the cis face of the Golgi apparatus, where they fuse with the Golgi membrane and empty their contents into the lumen. Once inside they are modified, sorted, and shipped towards their final destination. As such, the Golgi apparatus tends to be more prominent and numerous in cells synthesising and secreting many substances: plasma B cells, the antibody-secreting cells of the immune system, have prominent Golgi complexes.

Once the proteins reach the trans face, they are placed into coated transport vesicles and bud off to reach their final destinations. The form of the vesicle is determined by the type of protein and the label it acquired.

You could get more information from the link below...

2006-11-25 23:10:19 · answer #2 · answered by catzpaw 6 · 0 0

The Golgi apparatus (also called the Golgi body, Golgi complex, or dictyosome) is an organelle found in typical eukaryotic cells. It was identified in 1898 by the Italian physician Camillo Golgi and was named after him. The primary function of the Golgi apparatus is to process and package macromolecules synethesised by the cell, primarily proteins and lipids. The Golgi apparatus forms a part of the endomembrane system present in eukaryotic cells.

Structure
The Golgi apparatus is composed of a stack of flattened, membrane-bound sacs known as cisternae. Between five and eight are usually present, however as many as sixty have been observed[1]. Surrounding the main cisternae are a number of spherical vesicles which have budded off from the cisternae.

The cisternae stack has three functional regions: the cis face, medial region, and trans face. Vesicles from the endoplasmic reticulum fuse with the facing cis face and subsequently progress through the stack to the trans face, where they are packaged and sent to the required destination. Each region contains different enzymes which selectively modify the contents depending on where they are destined to reside

Function
Cells synthesise a large number of different macromolecules required for life. The Golgi apparatus is integral in modifying, sorting, and packaging these substances for cell secretion (exocytosis) or for use within the cell. It primarily modifies proteins delivered from the rough endoplasmic reticulum, but is also involved in the transport of lipids around the cell, and the creation of lysosome.

Enzymes within the cisternae are able to modify substances by the addition of carbohydrates (glycosylation) and phosphate (phosphorylation) to them. Proteins are also labelled with a signal sequence of molecules which determine their final destination. For example, the Golgi apparatus adds a mannose-6-phosphate label to proteins destined for lysosomes.

Vesicles which leave the rough endoplasmic reticulum are transported to the cis face of the Golgi apparatus, where they fuse with the Golgi membrane and empty their contents into the lumen. Once inside they are modified, sorted, and shipped towards their final destination. As such, the Golgi apparatus tends to be more prominent and numerous in cells synthesising and secreting many substances: plasma B cells, the antibody-secreting cells of the immune system, have prominent Golgi complexes.

Once the proteins reach the trans face, they are placed into coated transport vesicles and bud off to reach their final destinations. The form of the vesicle is determined by the type of protein and the label it acquired.

Transport mechanism
The transport mechanism itself is not yet clear; a number of hypotheses current exist:

Cisternal progression: the Golgi apparatus itself moves, building new cisternae at the cis face and destroying them at the trans face.
Static compartments: small vesicles transport the proteins from one cisterna to the next, while the cisternae remain unchanged.
It has also been proposed that the cisternae are interconnected, and the transport of cargo molecules within the Golgi is due to diffusion, while the localisation of Golgi-resident proteins is achieved by an unknown mechanism.

2006-11-25 18:38:06 · answer #3 · answered by ifureadthisur2close 2 · 0 0

It got some functions:
1. Produces Lysosome: which is a digestive enzyme digesting worn out organelles, food particles, or engulfed viruses or bacteria
2. Transporting substance: They can modify the structure of substances to be transported out of the cell, so for example enzyme releasing cells: They got prominent golgi complexes, because their function is specifically to excrete enzymes

2006-11-25 18:41:30 · answer #4 · answered by vahen 1 · 0 0

The Golgi packages proteins for secretion into the extracellular space, and for embedding into membranes.

Yes, the 4th responder adds a good point, glycosylation does occur in the Golgi, but only the O-linked variety of glycosylation. N-linked glycosylation occurs in the ER most likely.

2006-11-25 18:32:35 · answer #5 · answered by Brian B 4 · 0 0

Golgi complex is a multisacked organelle that secrets molecules out of the cell.

2006-11-25 19:35:15 · answer #6 · answered by Anonymous · 0 0

One function of the golgi apparatus is to?

2016-01-27 15:52:37 · answer #7 · answered by gdd 1 · 0 0

glycolization of proteins,glycolization of lypids, syntesis of the extracellular matrix, and cellular matrix synteiss. it produce the cellular secretion of sustances outside the cell, it is carried by vesicles that the golgy complex forms to carrie that sustances outside the cell

2006-11-25 18:34:57 · answer #8 · answered by Pinky 5 · 0 0

1) Sorting the protein to be sent to appropriate intercellular or extracellular destinations.
2) Put oligo groups to the protein.

2006-11-25 18:34:13 · answer #9 · answered by cally cally 1 · 0 0

it packages and ships proteins that the ribosomes make

2006-11-26 02:54:47 · answer #10 · answered by Anonymous · 1 0

fedest.com, questions and answers