By Catherine Beyer. The ankh is the most well known symbol to come out of ancient Egypt. In their hieroglyphic system of writing the ankh represents the concept of eternal life, and that is the general meaning of the symbol. Construction of the Image:
The outer layer of the double membrane is much more permeable than the inner layer, which features a number of embedded membrane transport proteins. Enclosed by the chloroplast membrane is the stroma, a semi-fluid material that contains dissolved enzymes and comprises most of the chloroplast's volume. Since, like mitochondria, chloroplasts possess their own genomes (DNA), the stroma contains chloroplast DNA and special ribosomes and RNAs as well.
  Both the mitochondria and chloroplasts (in plants) of eukaryotic cells contain their own genetic information. This is leftover from what is thought to be a symbiosis i â¦ n early eukaryotic cells.lthough much of the DNA (genetic material) that was originally in these organelles has now found its way into the host cell's nucleus with the rest of the cell's DNA, there is some still left in the organelles.