Chloroplasts
Chloroplasts which is present exclusively in plant cells are also have inner and outer membranes. As well there is an extensive internal membrane system made up of thylakoid vesicles (interconnected vesicles flattened to form discs) stacked upon each other to form grana .Within the thylakoid vesicles is the green pigment chlorophyll, along with the enzymes that trap light energy and convert it into chemical energy in the form of ATP. The stroma, the space surrounding the thylakoid vesicles is the site of carbon dioxide (CO2) fixation - the conversion of CO2 into organic compounds. Chloroplasts, such as mitochondria which contain DNA which encodes some of the chloroplast proteins.
![1407_chloroplast.png](https://www.expertsmind.com/CMSImages/1407_chloroplast.png)
Structure of (a) a mitochondrion and (b) a chloroplast.