ribsome: 70S ribosomes smaller than ribosomes on endoplasmic
reticulum and within the cytosol , same size as those in
prokaryotes. It composed of rRNA and proteins. It performs
translation which is the assembly of amino acids to form
proteins.
matrix: protein-rich region. It contains DNA loop,ribosomes and
many enzyme molecules. It is the site of the link reaction, Krebs
cycle and production of urea. Has appropriate enzymes and a
suitable pH for the Krebs cycle.
crista: Highly folded so as to increase surface area: volume ratio
aerobic respiration
outer mitochondrial membrane: Made up of phospholipid bilayer
and proteins. Pumps protons into intermembrane space;
Contains transport proteins for shuttling pyruvate into
mitochondrion . Makes ATP as well.
inner mitochondrial membrane: It is folded into cristae to give a
large surface area. Composed of a phospholipid bilayer with
protein complexes of electron transport chain and ATP
synthetase for oxidative phosphorylation. Pumps protons into
intermembrane space and makes ATP.
intermembrane space: lower pH than cytosol and matrix. It is
the site of high concentration of protons. Small space to
quickly accumulate protons.
FIGURE 1 : SHOWING TRANSMISSION ELECTRON MICROGRAPH OF A MITOCHONDRIA
