(2) How vesicles are used to transport materials within a cell

Cells will manufacture molecules for secretion outside of the cell. 

Some of these secretion molecules are complex combinations of proteins, carbohydrates and lipids.

1. After proteins have been synthesized by ribosomes they are transported to the rough endoplasmic reticulum where they can be modified. 

2. The protein is moved through the rER and modified.

3. A…