A) specialized granules responsible for colouration of cells
B) structures responsible for organizing the shape of the organism
C) inclusion bodies lying free inside the cells for carrying out various metabolic activities
D) internal membrane systems that may become extensive and complex in photo-synthetic bacteria
Correct Answer: D
Solution :
Phototoautotrophic bacteria contain thylakoids or chromatophores with photosynthetic pigments like bacteriochlorophyll and bacteriophaeophytin. Chromatophores are internal membrane system present in photosynthetic prokaryotes. These develop as membrane lined sacs or thylakoids from plasma membrane.
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