A mitochondria contains outer and inner phospholipid bilayer and proteins.There are 5 distinct part of mitochondria they r as follows:1)the outer membrane,2)inner membrane,3)intermediate membrane,4)cristae space,5)matrix
outer membrane:this contain large no. of proteins called porins
intermediate membrane:contains only one protein i.e,cytochrome c.
inner membrane:it contains 151 polypeptides and perform different functions,it also contain 1/5 of the total protein present in mitochondria,also it has an unusual phospholipid called cardiolipin.
cristae space:it expands the area of mitochondria and allows production of ATP in large nos.,also these are studd with F1 particles called oxysomes.
Matrix:It contain 2/3 of the total protein of mitochondria,it helps in the production of ATP,it also has many enzymes,ribosomes,tRNA,and copies of mitochondrial DNA genomes.
Its function is to give energy to the cell by producing ATP,also mitochondria are often called "POWERHOUSE" of the cell.