If sugar must be broken down to release energy through cellular respiration, why is ATP needed in the process? Explain.

Energy (ATP) is needed at the start of glycolysis to split the glucose molecule into two pyruvate molecules . these two molecules go on to stage II of cellular respiration. The energy to split glucose is provided by 2 molecules of ATP

the denominator has a very specific role.

2%? i tried finding the exact sorry if it's not 100% correct ; -;