BI110 Lecture Notes - Lecture 1: Cellular Respiration, Chemical Kinetics, Chemosynthesis
Document Summary
Energy and matter: organisms interact with their environment, exchanging energy and matter. Matter: anything that occupies space and has mass. Energy: the capacity to do work: takes many forms: Kinetic (energy of motion: one form of energy may be converted to another, organisms require energy for essential life functions (i. e. growth and reproduction) The sun: most of earth"s living organisms acquire their energy directly or indirectly from the sun, sun emits electromagnetic energy, including: Organic molecules: compounds that mainly contain carbon and hydrogen atoms: carbon dioxide, which does not contain hydrogen is considered inorganic. Chemosynthesis: other producers that are able to acquire energy through inorganic chemical reactions. Example: oxygen is a waste product of photosynthesis; used for cellular respiration. carbon dioxide is a waste product of cellular respiration; used for photosynthesis. Chemical reactions: chemical energy is stored in bonds that join atoms together into molecules, molecular bonds are made and broken though chemical reactions that are converting reactants into products.
