Question

(a) Define dictyosome. Point out the difference between Golgi appartus of plant and animal cells.
(b) Why is Golgi appartus called Golgi apparatus.
(c) Name an organism and cell where Golgi apparatus is absent.

Answer 1

(a) Dictyosomes are stacks of flat,membrane-bound cavities (cisternae) that together, comprise the Golgi apparatus. Within the dictyosomes, proteins are stored, modified, sorted and packed into vesicles(Golgi vesicles) for further transport.

The plant has multiple small Golgi apparatus which produce oligosaccharides of the cell wall.They have to change cistrnal size with intraluminal elements in cisternae.

In the animal cell there are few, large size Golgi apparatus.The cistrnae size is usually constant.The animal cells do not have the cell wall.

(b ) The characteristics of Golgi apparatus were first described by scientist Camillo Golgi in 1898 when he named it " internal reticular apparatus".The official name Golgi apparatus was given in 1954.

(c) Blue-green algae, mature sperm cells, and reticulocytes or mature RBCs do not have Golgi apparatus.