Draw well labeled diagram of ultrastructure of chloroplast.

1. The chloroplasts are discoid and lens shaped in higher plants. Chloroplast is bounded by a double membrane. System of chlorophyll bearing a double-membrane sac is present inside the stroma. 

2. These are stacked one above the other to form grana. 

3. Individual sacs in each granum is are known as thylakoid. 

4. All the pigments chlorophylls, carotenes and xanthophylls are located in thylakoid membranes. 

5. These pigments are fat soluble and are present in lipid part of membrane also they absorb light of specific spectrum in the visible regions.