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BIO 121 Study Guide 5 2025 Questions and Answers What is metabolism, and what is the difference between anabolism and catabolism? - ....ANSWER☑️☑️...-chemical reactions that occur IN cells Anabolism - reactions that build molecules Catabolism - reactions that break down molecules Why do cells need energy, and what is the difference between potential energy and kinetic energy? - ....ANSWER☑️☑️...-Energy is a cell's ability to do work; maintain processes associated with life Potential energy - stored energy; potential energies stored in living systems is chemical energy stored in chemical bonds in our food kinetic - energy of motion What are the first and second laws of thermodynamics? - ....ANSWER☑️☑️...-1) energy cannot created or destroyed, but can be converted from one form to another 2) Entropy (disorder) of universe always increases (S = entropy) All things become less ordered because keeping order requires energy FOR STUDY PURPOSES ONLY ©️ 2025 ALL RIGHTS RESERVED 1