ATP http://www.biology-online.org/1/2_ATP.htm http://www.biology-online.org/1/2_ATP.htm http://www.biology-online.org/1/2_ATP.htm adenosine triphosphate ADP http://www.biology-online.org/1/2_ATP.htm ADP ATP http://www.biology-online.org/1/2_ATP.htm ATP biology-online.org Biological Energy – ADP & ATP Biological Energy - ADP & ATP ATP