PHOTOSYNTHESIS CAPTURING THE ENERGY IN LIGHT All organisms use energy to carry out the functions of life. Some organisms obtain this energy directly from sunlight. They capture part of the energy in light and store it within organic compounds. The process by which this energy transfer takes place is called PHOTOSYNTHESIS. Photosynthesis is the process that provides energy for almost all Life OBJECTIVES Explain how the structure of the chloroplast relates to its function Explain how ATP is synthesized during the light reactions They begin with the ABSORPTION of Light in the organelle found in Plant Cells and algae called CHLOROPLASTS During Photosynthesis, Autotrophs use the Sun's Energy to make Carbohydrate Molecules from Water and Carbon Dioxide, Releasing Oxygen as a Byproduct The Process of PHOTOSYNTHESIS CAN BE SUMMARIZED BY THE FOLLOWING EQUATION 6CO CARBON DIOXIDE 2 + 6H2O WATER + LIGHT ENERGY C6H12O2 6-CARBON SUGAR + 6O2 OXYGEN GAS In this equation the Six-Carbon Sugar GLUCOSE and Oxygen are the Products. The Energy Stored in Glucose and other Carbohydrates can be used later to produce ATP during Cellular Respiration Draw the following chart: Most AUTOTROPHS or PRODUCERS use PHOTOSYNTHESIS, to Convert the Energy in SUNLIGHT, CARBON DIOXIDE, AND WATER into Chemical Energy OR FOOD. (GLUCOSE) THE FOODS MADE BY AUTOTROPHS ARE stored in various Organic Compounds, primarily CARBOHYDRATES, including a SIXCARBON SUGAR called GLUCOSE. Cellular Respiration Autotrophs, such as plants, use photosynthesis to convert light energy from the Sun into Chemical energy, which is stored in Carbohydrates and other Organic Compounds. Both Autotrophs and Heterotrophs depend on these Organic Compounds for the energy to Power Cellular Activities. By Breaking Down Organic Molecules into simpler molecules, CELLS RELEASE ENERGY. Some of the energy is used to make ATP from ADP and Phosphate. ATP is the Main Energy Currency of Cells. Cellular Respiration The Complex Process in which Cells Make ATP by Breaking Down Organic Molecules is known as CELLULAR RESPIRATION. OR THE PROCESS BY WHICH FOOD MOLECULES ARE BROKEN DOWN TO RELEASE ENERGY FOR WORK IS CALLED CELLULAR RESPIRATION PHOTOSYNTHESIS EQUATION: 6CO2 + 6H2O + LIGHT ENERGY C6H12O6 + 6O2 Sugar oxygen CELLULAR RESPIRATION EQUATION C6H12O6 + 6O2 6CO2 + 6H2O + ENERGY RELEASED (ATP) the metabolic processes whereby certain organisms obtain energy from organic molecules, processes that take place in the cells and tissues during which energy is released and carbon dioxide is produced and absorbed.