chloroplast contains proteins, lipids,carbohydrates,DNA,RNA, คาร์โรทีนอยด์,chlorophyll and minerals. Composition of these chemical were indicated in the following table.
photosynthetic pigments
pigments carrying out photosynthesis are called as photosynthetic pigments.
chloroplast also contains photosynthetic pigments. they are chlorophylls , carotenoids and phycobilins. chlorophyll a absorbs well at a wavelength of about 400-450 nm and at 650-700 nm; chlorophyll b at 450-500 nm and at 600-650 nm. xanthophyll absorbs well at 400-530 nm. however,none of the pigments absorbs well in the green-yellow region, which is responsible for the abundant green we see in nature.
carotenoids are usually red , orange ,or yellow pigments , and include the familiar compound carotene. ( carotenes and xanthophyll )