mer membrar'e Matrix Cuer membrane Figure 2.34 Electron micrograph and drawing of mitochondria show ing the otter and inner membranes. The highly folded inner membrane forms the crist e which project into the matrix containing DNA, RNA, ribosomes, an various protein Stroma Itvlakoid Figure 2.31 Electron micrograph and drawing of a chloroplast showing the inner and pter membranes as well as the stacks of membranous thylakoids contained in the central troma.The stroma contains DNA, RNA, ribosomes, and various proteins