Energy is measured in a unit called a calorie, the amount of energy needed to raise the temperature of 1 gram of water 1 degree Celsius. The organisms are made of cells, adding to the fact that cells are a basic unit of life. Energy is released when chemical bonds in food molecules are broken. The understanding that a cell is a basic unit for life is because cellular respiration is when organisms obtain energy from food. light-independent reactions ~ATP & NADPH molecules produced in the light- dependent reactions are used to produce high- energy sugars from carbon dioxide ~this requires no light & takes place in the stroma -both types of reactions work together to capture the energy of sunlight & transforms it into energy-rich compounds. 9.1 Lesson Summary Cellular Respiration: An Overview Chemical Energy and Food Chemical energy is stored in food molecules. Light-dependent & Light-independent Reactions Aerobic respiration is the process of breaking down a respiratory substrate in order to produce ATP using oxygen Anaerobic respiration takes place in the. ~the reaction uses energy from sunlight to produce energy-rich compounds like ATP. light-dependent reactions ~first set-they require the direct involvement of light & light absorbing pigments. plants use sugars to produce complex carbohydrates & provide energy for synthesis of other compounds Photosynthesis releases oxygen into the atmosphere & cellular respiration uses that oxygen to release energy from food. Photosynthesis removes carbon dioxide from the atmosphere & cellular respiration puts it back. Electron Transport Chain-the reactants of the other stages are used to generate the bulk of the energy. Krebs Cycle-glucose goes through the cycle & a little bit more energy is captured. A Comparison of Photosynthesis and Cellular Respiration Aspect Photosynthesis Cellular Respiration Function energy capture Location of reactions chloroplasts Reactants Products 17. glycolysis: glucose enters the cell & a small amount of ATP is captured. ~6O2 + C6H12O6 -> 6CO2 + 6H2O + Energy Oxygen + glucose -> carbon + water + energy dioxide -There are different stages of cellular respiration so the energy is controlled when it's released.ฤก. Cellular respiration-the process that releases energy from food in the presence of oxygen. If cellular respiration took place in just one step, most of the would be lost in the form of light and. The equation that summarizes cellular respiration, using chemical formulas, is. ~There is a lot of energy in food, & it's expressed in calories ~Cells gradually break down food molecules & use the energy to produce compounds such as ATP. Overview of Cellular Respiration For Questions 510, complete each statement by writing the correct word or words. 9.1~Cellular Respiration: An Overview -Organisms get the energy they need from food. The three main stages of cellular respiration are glycolysis, the Krebs cycle, and the electron transport chain.
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