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Chloroplasts contain structures called thylakoids (this is where photosynthesis takes place); inside the thylakoid membrane are colored photosynthetic pigments.

There are a total of 6 photosynthetic pigments, although 2 are by far the most important; these are known as Chlorophyll.

There are two forms of Chlorophyll, Chlorophyll a and Chlorophyll b. Chlorophyll a absorbs light in the 700 mn (nanometer) frequency range and Chlorophyll b in the 680 nm frequency range of the visible light spectrum.

The 6 photosynthetic pigments are:

Chlorophyll a (C55H72MgN4O5) is blue-green in color (reflects this colour)

Chlorophyll b (C55H70MgN4O6) is yellow-green in color

Carotene is orange in color

Xanthophyll is yellow in colour

Phaeophytin a is grey-brown in color

Phaeophytin b is yellow-brown in color

The different locations and concentrations of these pigments give plants their various colors.

The main pigments found In chloroplast is CHLOROPHYLL.

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