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.
A: Chloroplasts are the organelles other than the nucleus and mitochondria that contain their own DNA. Chloroplasts are found in plants and certain forms of protists. Their DNA and ribosomes are located in the stroma. Chloroplasts are the site of photosynthesis in plants and contains the green pigment known as chlorophyll.