1. Protein: About 35-55% of the dry weight of chloroplasts is protein. Of this, insoluble protein is 80% and soluble protein is 20%.
2. Lipids: 10-20% of the dry weight of chloroplasts are lipids. Among them, phospholipids are the most.
3. Dyes: It contains 6-12% dyes. Among them 75% chlorophyll-a, 25% chlorophyll-b, carotene, xanthophyll etc.
4. Nucleic acid: Chloroplast contains 5% nucleic acid. Nucleic acids are DNA and RNA.
5. Mineral Salt: It contains 3% mineral salt. Mineral salts are high in magnesium. Besides, ion and copper are worth mentioning.
6. Carbohydrates: Chloroplasts do not contain specific amounts of carbohydrates. It is always changing. Starch is its simple carbohydrate.