BIOL 1000 Lecture Notes - Lecture 6: Radiant Energy, Cellular Respiration, Photosynthesis

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2 Feb 2017
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Collection of metabolic reactions within cells that breaks down food molecules and uses liberated free energy to synthesize atp. Examples of molecules that are broken down is carbohydrates, fats, and proteins. Atp is the form of energy that is required for thousands of biosynthetic reactions that take place in the cell. Glucose and other organic molecules are oxidized by removal high-energy electrons. After series of reactions that release energy at each step the electrons are delivered at low energy levels of oxygen. Some energy is used to drive the synthesis of atp from adp + phosphate. Ultimate source of energy found in carbohydrates, fats, proteins is photosynthesis. Light energy is used to extract electrons from water and then the electrons then combine with hydrogen to reduce carbon dioxide into glucose. Major by-product of photosynthesis is oxygen, a molecule needed for the most common type of cellular respiration.

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