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.

                   Structure of (a) a mitochondrion and (b) a chloroplast.