The Golgi apparatus plays an 
important role in transform- 
ing many newly made 
proteins into mature, func- 
tional ones. Moreover, the 
Golgi apparatus serves to 
“package” certain proteins, 
including enzymes and 
hormones, into vesicles that 
will later be secreted from the 
cell. And finally, the Golgi 
apparatus adds “addresses” 
to proteins that are destined 
to go to another organelle, 
called the lysosome. 
The elaborate organization of 
the Golgi apparatus into sep- 
arate compartments prevents 
the release of thousands of 
enzymes that, if mixed, would 
result in uncontrolled bio- 
chemical reactions inside 
the cell. 
31 
Electron micrograph 
opposite page ) and 
Ira wing (below) show a 
wries of cup-shaped 
'(ICS making up a Golgi 
