Storage form of free energy in the cell is:
ATP is the storage form of free energy in most of the cells of the body. Creatine phosphate or Phospho-creatine is the immediate source of ATP in muscles for first 8-10 seconds. High energy compounds in biological systems are : ATP GTP UTP Creatine Phosphate Phosphoenol Pyruvate Coenzyme A 1,3-bisphospho glycerate Carbamoyl Phosphate
NADH
ATP
G-6-Phosphate
Creatine phosphate
Sources of blood glucose