Prokaryotic cells are simpler and lack the eukaryote's membrane-bound organelles and ... eukaryotes are single-celled — think ...

By manipulating the number of positive ions, 'inside and outside its membrane, 'the paramecium creates a potential difference of 40 millivolts. When it bumps into something, its cell membrane ...

All mitochondria retain core genomes of their own, which are necessary for the control of membrane potential across ... Multiple mitochondria in the ciliate Paramecium bursaria (scale bar in ...