Nuclear region
• Instead of nucleus, bacteria have a nuclear region, or nucleoid.
• Consists mainly of DNA
• Some RNA and protein associated with it
Internal membrane system
• Photosynthetic bacteria and cyanobacteria contain internal membrane
systems, sometime known as chromatophores.
• The membrane of the chromatophores, derived from the cell membrane
• Contain the pigments used to capture light energy for the synthesis of sugar