Structural Biochemistry/Functional Categories of Eukaryotic Organelles

All the different membranous organelles perform different tasks in the cell (animal cells and plant cells). However, they also communicate with each other though ions and lipids. In addition, some of the organelles have membrane that are connected. The others are related by transfer of membrane segments. As we know, structures determine functions in a lot of ways in nature. We can categorize eukaryotic organelles into four categories according to their general functions.

Manufacturer

In this first category, nucleus, ribosomes, rough ER, smooth ER and golgi apparatus are included. They can perform this task because of they have metabolically active membranes. Some of them can also perform transportation of the products. Below is some examples of the manufacturing task these organelles do.

Nucleus--DNA and RNA synthesis
Ribosome--Polypeptide(protein) synthesis
Rough ER--Membrane protein synthesis, secretory proteins synthesis and hydrolytic enzymes synthesis; formation of transport vesicles
Smooth ER--Lipid synthesis; detoxification and carbohydrate metabolism in liver cells
Golgi apparatus--Modificaiton, temporary storage and transportation of macromolecules such as proteins; formation of lysosomes and transport vesicles

Waste disposer

In this category, lysosomes, peroxisomes and vacuoles are included. They are all consist of single membrane sac that can be used to collect materials and/or break down unwanted/harmful materials.

Lysosomes--Digestion of bacteria, damaged organelle
Peroxisomes--breakdown of H₂O₂ by-product
Vacuoles--Digestion of waste products; collect excess water from the cell

Energy provider

In this category, chloroplasts and mitochondria are included. They both have metabolically active membranes and intermembrane compartments that can convert energy units to provide to the cells.

Chloroplast--Conversion of light energy to chemical energy in plant cells
Mitochondria--Conversion of chemical energy of food to chemical energy of ATP

Support, Movement and Communication between cells

In this last category, cytoskeleton(such as cilia, flagella and centrioles in animal cells), cell walls(in plants, fungi and some protists), extracellular matrix(in animal cells) and cell junctions are included. They are all responsible for the keeping cells in shape.

Cytoskeleton--Maintenance of cell shape; movement of organelles within cells; cell movement; mechanical transmission of signals from exterior of cell to interior
Cell walls--Maintenance of cell shape and skeletal support; surface protection; binding of cells in tissue
Extracellular matrix--Binding of cells in tissues; surface protection; regulation of cellular activities
Cell junctions--Communication between cells; binding of cells in tissues