Hi! If I could get an answer to this question I could understand biology alot easier. In the cell interior, the endoplasmic Reticulum manufactures proteins and are then transported by a vesicle to the Golgi Apparatus where they are modified or processed and sorted. My question is, ''how do the molecules know where to go all the time, do they each carry a charge and so are attracted to opposite charges or what?'' And when the proteins are sorted in the Golgi they are tagged, how are they tagged?