Chapter 4
Question 27-Discuss the structure and function of ribosomes, endoplasmic reticulum, and the Golgi apparatus, including functional interrelationships among these organelles.

1)Ribosomes-Dark small granules made up of proteins and a type of RNA, called ribosomal RNA. Each ribosome have two units that fit together like an acorn. Protein synthesis happens in the ribosomes. Some ribosomes in the cell are attached to the rough endoplasmic reticulum. This helps make the job of protein synthesis go much quicker, by them being attached to the rough ER.
2)Endoplasmic reticulum-This is a long system of connected tubes and membranes enclosing cisternae, or fluid filled cavities, that goes though cystol. The ER takes up about 50% of the cells membranes. There is a smooth ER with no ribosomes on it, and a rough ER with no ribosomes. The ribosomes on the rough ER make all the proteins secreted from cells. The smooth ER just catalyzes reactions, it doesn't have a part in protein making
3)Golgi Apparatus-Is made up of stacked and flattened circular membranous sacs. The Golgi Apparatus is the "traffic director" for cellular proteins. Its main job is to modify comcentrate, and package the lipids and proteins that are made at the rough ER. There are transport vesicles that bud off the rough ER, they fuse with the receiving side of the Golgi apparatus. The smooth ER doesn't interact with it, because there are no proteins in it