The matrix is the inner compartment of a mitochondrion, where many metabolic reactions, including those of the Krebs cycle and oxidative phosphorylation, occur.
These are organelles found in large numbers in most cells, where biochemical processes of respiration and energy production occur.
This is a jelly-like substance within cells that contains all organelles and cell parts.
These are proteins that act as biological catalysts to speed up chemical reactions within cells.