In plants only, the plastid containing chlorophyll and the site of photosynthesis. It is always bounded by a double unit membrane.
Words: chloroplast envelope (2 membranes), plastoglobuli, granum (stack of thylakoids), intergranal thylakoid, stroma, starch grain
A green pigment found in the chloroplasts of plants which is important in photosynthesis. There are two forms of chlorophyll, chlorophyll a and chlorophyll b.