The inner membrane is folded inside to form cristae, which are folded into the matrix. Mitochondria are the organelles of cellular respiration in nearly all cells. Chemical energy called adenosine triphosphate (ATP) is produced by harvesting energy from sugars and other food molecules. Molecules of ATP are used by cells as a direct source of energy for most of their work. Mitochondria and chloroplasts have the ability to provide cellular energy and they contain their own DNA that encodes some of the own proteins.
Organelles that perform photosynthesis in photosynthetic cells of plants and algae are called chloroplasts. Chloroplasts have three major compartments; the first compartment is the space that is in between the two membranes that surrounds the chloroplast. The next compartment is a thick fluid within the chloroplast called the storma. Then finally suspended in the fluid is a network of membrane-enclosed disks and tubes. The disks occur in interconnected stacks called grana, which are the chloroplasts solar power packs. Cilia and flagella are made up of microtubules that are enclosed in an extension of a plasma membrane; cilia are short structures while flagella are long structures. A cell usually consists of one flagellum or two flagella, but a large number of cilia are present in a cell. They provide movement for organisms through