...the key of A minor. 5 n-count The key on a map or diagram or in a technical book is a list of the symbols or abbreviations used and their meanings. You will find a key at the front of the book. 6 adj The key person or thing in a group is the most important one.
ATP (Adenosine triphosphate). 1  It is the major energy currency of the cell, providing the energy for most of the energy-consuming activities of the cell. 2  It is one of the monomers used in the synthesis of RNA and, after conversion to deoxyATP (dATP), DNA.3  It regulates many biochemical pathways. It is the major energy currency of the cell, providing the energy for most of the energy-consuming activities of the cell. 2  It is one of the monomers used in the synthesis of RNA and, after conversion to deoxyATP (dATP), DNA. 3  It regulates many biochemical pathways.
First, we need to know what ATP really is-chemically, it is known as adenosine triphosphate. ATP is a usable form of energy for cells-the energy is trapped in a chemical bond that can be released and used to drive other reactions that require energy (endergonic reactions).irst, we need to know what ATP really is-chemically, it is known as adenosine triphosphate. ATP is a usable form of energy for cells-the energy is trapped in a chemical bond that can be released and used to drive other reactions that require energy (endergonic reactions).