You eat a bowl of beans as part of your dinner. as you digest the beans, the proteins that are present get broken down to their component amino acids. as your body destroys the macromolecules that were present in the beans, is the energy present in those molecules destroyed?

No, the energy contained within these macromolecules is converted into other forms of chemical energy and kinetic energy, though some is lost as heat.

Explanation:

The beans are the source of macromolecules which are taken as a source of food. These macromolecules are the source of chemical energy, which is used to generate ATP molecules required for metabolic functions in the body. This is the source of kinetic energy used to perform various functions in the body. Some of the energy is also lost in the form of heat.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.