Colorized transmission electron micrograph (TEM) of a portion of a fully dispersed chloroplast molecule showing typical DNA conformations. Platinum shadowed on carbon-mica substrate. Chloroplasts are the structures containing the green pigment chlorophyll and are largely found in most cells of green plants that are exposed to light. Chlorophyll is responsible for the absorption of light during photosynthesis. The pigment absorbs the red and blue-violet parts of sunlight but reflects the green, therefore giving plants their characteristic color. Magnification: 29,000x.