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Biology Chapter 8
Cellular Energy Vocabulary
Term | Definition |
---|---|
Metabolism | All of the chemical reactions that occur within an organism. |
Photosynthesis | Two-phase anabolic pathway in which the Sun's light energy is converted to chemical energy for use by the cell. |
Cellular Respiration | Catabolic pathway in which organic molecules are broken don to release energy for use by the cell. |
Adenosine Triphosphate (ATP) | Energy-carrying biologic molecule, which, when broken don, drives cellular activities. |
Thylakoids | In chloroplasts, one of the stacked, flattened, pigment-containing membrane in which light-dependent reactions occur. |
Granum | One of the stacks of pigment-containing thylakoids in a plant's chloroplasts. |
Stroma | Fluid-filled space outside the grans in which light-dependent reactions take place. |
Thermodynamics | Study of the flow and transformation of energy in the universe. |
First Law of Thermodynamics | Energy can be converted from one form to another, but cannot be created nor destroyed. |
Second Law of Thermodynamics | Energy cannot be converted without the loss of usable energy. |
Pigment | Light-absobring colored molecule, such as chlorophyll and carotenoid, in the thylakoid membrane of chloroplasts. |
NADP+ | A coenzyme that exists in many living cells |
Calvin Cycle | Light-independent rea lions during phase two of photosynthesis in which energy is stored in organic molecule as glucose. |
Rubisco | Enzyme that converts inorganic carbon dioxide molecules into organic molecules during the final step of the Calvin cycle. |
Anaerobic Process | Metabolic process that does to require oxygen. |
Aerobic Respiration | Metabolic process in which pryruvate is broken don and electro-carrier molecule are used to produce ATP though electron transport |
Aerobic Process | A metabolic process that requires oxygen |
Gycolysis | Anaerobic process; first stage of cellular respiration in which glucose is broken down into two molecules of pyruvate. |
Krebs Cycle | Series of rations in which pyruvate is broken down into carbon dioxide inside the mitochondria of cells, also called the tricarboxylic acid cycle and the citric acid cycle. |
Fermentation | Process in which NAD is regenerated, allowing cells to maintain glycolysis in the absence of oxygen. |
Lactic Acid Fermentation | Enzymes convert they pyruvate made during glycolysis to lactic acid. |
Chemiososis | The movement of ions across a semipermeable membrane, down their electrochemical gradient. |
Electron Transport | Electron carriers are reduced during glycolysis and the citric acid cycle to NADH +H and FADH2. These carrier then donate electrons and protons to the electron carrier proteins of the electron transport chain. |