<prompt> Storage form of free eneragy in the cell -Creatine phosphateATPNADHG-6-P  <response>: Ans. is b i.e., ATP o For a biological reaction to proceed in forward direction, free energy DG should be less than 0.o Many biological reactions such as synthesis of macro molecules are thermodynemically unstable, i.e. their free energy DG 0.o In order for such reactions to proceed, addtional source of energy is required.o ATP plays a central role by acting as a store offree energy with in the cell. Hydrolysis of ATP provides a significant free energy for such reactions. 