It's because all living things need energy to do a specific thing for a much longer period of time. If chemical reactions undergo releasing energy, you wouldn't be able to function on something, and it would be for a much shorter period of time.
It flows from a high to low concentration gradient across the membrane.
Metabolism is the chemical processes that occur within a living organism in order to maintain life. Have a good day! Also, any answer that says, ‘Here is the link to your answer: (link)’ DO NOT CLICK ON IT!!
