Question

multiple choice question
chemical energy is stored in _.
o electrolyte concentrations on one side of a membrane
o bonds of molecules
o heat
o protons of an atom

Explanation:

Chemical energy is stored in the bonds of molecules. When these bonds are broken or formed during chemical reactions, energy is released or absorbed. Electrolyte concentrations across a membrane relate to electrical - chemical gradients, heat is a form of energy transfer, and protons in an atom are related to nuclear and atomic structure rather than chemical energy storage.

Answer:

bonds of molecules