These medical condition or symptom topics may be relevant to medical information for Orchialgia: 1  Pain (6458 causes) 2  Pain symptoms (6458 causes) 3  Pain disorder.  Pain 1  syndrome. Testis.  Testis symptoms (247 1  causes) Testis disorder.  SYN. Orchalgia.
The innermost matrix of chloroplasts, called the stroma, contains metabolic enzymes and multiple copies of the chloroplast genome. Chloroplasts also have a third internal membrane called the thylakoid membrane, which is extensively folded and appears as stacks of flattened disks in electron micrographs.
Within the inner membrane is the stroma, a fluid matrix that contains all the enzymes neccessary for photosynthesis as well as the chloroplast genome, ribosomes, and RNA for self-replication. The stroma flows around a system of thylakoids: membraneous, flattened sacs. Thylakoid membranes are the site of photosynthesis.he presence of chlorophyll in chloroplasts gives plant cells their green color. Although they are found in the cells of all green plants, chloroplasts are most dense in the leaves, where they can absorb the maximum amount of light energy. A single plant cell may contain up to 50 chloroplasts.