Mesosome & Chromatophores (Membranous structures)

• Mesosome is formed by the infolding of plasma membrane. It includes vesicles, tubules & lamellae.
• Functions: Mesosome helps
• o In cell wall formation.
• o In DNA (chromosome) replication.
• o In Distribution of chromosomes to daughter cells.
• o In respiration and secretion processes.
• o To increase the surface area of the plasma membrane and enzymatic content.
• Chromatophores are membranous infoldings in some prokaryotes (e.g. cyanobacteria). They contain pigments.