8.2: What is the Role of ATPin Biochemical Energetics
Answer: the capture and transfer of free energy they require to do chemical work.
It also can be converted into a building block for nucleic acids.
1. ATP releases a large amount of energy when hydrolyzed toADP and P i
2. ATP can phosphorylate (donate a phosphate group) which gives the molecule energy
ATP hydrolysis releases energy
ATP: nitrogenous base, ribose, 3 phosphate groups
Hydrolysis yields: free energy,ADP, phosphate ion
Two characteristics ofATP account for free energy release:
1. Takes energy to get two phosphates near each other
2. Free energy of P~O bond (phosphoric acid anhydride bond) is higher than O—H bond
Cells use the energy released byATP hydrolysis to: fu