Compare the structure of two membrane organelles (mitochondria, chloroplasts) and bacterial cells.

Compare the structure of two membrane organelles (mitochondria, chloroplasts) and bacterial cells. What similarities are found? Guess how they can be explained.

Mitochondria and chloroplasts have their own circular DNA molecule (ancestral information), and these organelles are surrounded by two cell membranes. This brings them closer to bacteria that also have a circular DNA molecule, a cell wall of murein and a cell membrane. The similarity of the structure of a bacterial cell and chloroplasts with mitochondria can be explained by the theory that mitochondria and chloroplasts were previously an independent nuclear-free cell, which was transformed into organelles during evolution.