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B
Photosynthesis
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C
Growth
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D
Movement
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Solution
The correct option is A Photosynthesis Chromatophores are found in members of phototrophic bacteria. They contain bacteriochlorophyll pigments and carotenoids and take part in photosynthesis. In purple bacteria, such as Rhodospirillum rubrum, the light-harvesting proteins are intrinsic to the chromatophore membranes.