General Biology Definition of protobiont Protobionts are ____ a Bacteria resembling very simple cells which are precursor to early life b Bacteria that cause sexually transmitted diseases c Good bacteria that live in our gut d Microspheres with trapped inorganic and organic molecules e Cells with mitochondria and chloroplasts Check Answer Protobionts are microspheres with trapped inorganic and organic molecules that are thought to be precursors of prokaryotic cells, including bacteria. Copy link ← Previous Random Next →