Which molecule is used by cells as an energy source? many substances, such as cholesterol, bind to on the cell membrane, triggering endocytosis.

Ithink the answer is maybe a

U. life is what you go through to become a better person. it makes you stronger, wiser, and more creative. it can be hard but its ok. because i believe everyone was put here for a reason. whether or not you know that reason you should always look towards the future and trust in god for a better tomorrow.be safe and blessed