In membranes chlorophyll molecules therefore exactly there is a photosynthesis settle down. In hloroplasta also ATP is synthesized. Between internal membranes of chloroplast DNA, RNA and ribosomes contain. Therefore, in hloroplasta as well as in mitochondrions, there is a synthesis of the protein necessary for activity of these organelles. Hloroplasta breed division.
On a structure of a hloroplasta are similar to mitochondrions. From cytoplasm chloroplast is delimited by two membranes - external and internal. The external membrane smooth, without folds and outgrowths, and internal forms many folded outgrowths directed in chloroplast. Therefore in chloroplast a large number of the membranes forming special structures - grana is concentrated. They are put like a rouleau.
Cellular theory. In the middle of the XIX century on the basis of already numerous knowledge of a cage T. Shvann formulated the cellular theory (18 It generalized the being available knowledge of a cage and showed that the cage represents the main unit of a structure of all live organisms that cages of animals and plants are similar on the structure. These provisions were the most important proofs of unity of an origin of all live organisms, unity of all organic world. T. Shvan brought in science the correct understanding of a cage as independent unit of life, smallest unit of the live: out of a cage there is no life.
Ribosomes. Ribosomes are found in cages of all organisms. These are microscopic little bodies of a roundish form with a diameter of 15-20 nanometers. Each ribosome consists of two particles, unequal by the sizes, small and big.
The endoplasmic network is non-uniform on the structure. Two of its types - granular and smooth are known. On membranes of channels and cavities of a granular network the set of small roundish little bodies - ribosomes which give to membranes a rough look settles down. Membranes of a smooth endoplasmic network do not bear ribosomes on the surface.