LIFE SCIENCE

Detailed explanation-1: -Proteins are sorted into the regulated secretory pathway in the trans Golgi network, where they are packaged into specialized secretory vesicles. These secretory vesicles, which are larger than other transport vesicles, store their contents until specific signals direct their fusion with the plasma membrane.

Detailed explanation-2: -The Golgi apparatus receives proteins and lipids (fats) from the rough endoplasmic reticulum. It modifies some of them and sorts, concentrates and packs them into sealed droplets called vesicles.

Detailed explanation-3: -Answer and Explanation: The organelle that packages proteins before they leave the cell is the Golgi apparatus. The Golgi apparatus will receive proteins from the endoplasmic reticulum via its cis face, and then package them and modify them in various ways.