Which chemical reaction would result in the greatest release of energy? a)adp + p --> atp b)atp + oxygen --> adp + p c)pyruvic acid + nadh --> lactic acid + nad+ d)carbon dioxide + water --> glucose + oxygen

The answer is B)  ATP + oxygen --> ADP + P

Adenosine triphosphate (ATP) is the energy currency stored in every living cell. ATP is a complex molecule which composed of the nucleoside adenosine and a tail of three phosphates. Normally energy is released from the ATP molecule by a reaction that removes one of the phosphate-oxygen groups and becomes adenosine diphosphate (ADP). Thus, ATP converts to ADP to liberate energy. ADP soon after release, it is recharged in the mitochondria and comes out again as ATP.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products