ATP became the universal energy currency of cells early in the evolution of life forms. In time, electron transport chains and chemiosmosis also evolved which used membrane proteins to move electrons and to pump hydrogen ions and were ultimately adapted to produce power for ATP synthesis. Light absorbing pigments were used to absorb excess light energy. These pigments were later coupled to electron transport systems to also drive ATP synthesis. These prokaryotes release sulfur as a by product.
Cyanobacteria are photosynthetic organisms belonging to the Moneran kingdom.
The monerans evolved metabolic process known as photosynthesis from other metabolic processes. Explain the origin of chloroplast. Eukaryotic cells are cells with a true nucleus. A eukaryotic is thought to have originated when the plasma membrane of a cell pocketed inwardly pushing the chromosome into the center of the cell. This more central position protected the chromosome from being caught up into a food vacuole in which the DNA material of the cell might have digested .