What makes chloroplasts reddish or yellowish in colour?

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Solution

Chloroplasts:
Chloroplast is a membrane-bound organelle present in all green plants and algae.
They contain chlorophyll pigments that trap sunlight and participate in photosynthesis.
Chlorophyll D and Chlorophyll F is referred to as red chlorophyll found in marine red algae and cyanobacteria.
These pigments absorb infrared light and make the chloroplasts appear reddish.
Chlorophyll B is the yellow pigment that absorbs light energy for photosynthesis.
It is present in all higher plants and green algae and is referred to as the helper pigment.

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