photosynthesis occurs only in plants, algae, and some bacteria. Photosynthesis:Ĭomparing Photosynthesis and Cellular Respiration cell respiration occurs in plants, animals, fungi, protists, and most bacteria. Name Class Date 9. 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. Table 9.1 Comparison of Photosynthesis and Cellular Respiration. Photosynthesis “deposits” energy, and cell respiration “withdraws” energy. Overview of Cellular Respiration For Questions 510, complete each statement by writing the correct word or words. Photosynthesis and Cellular Respiration Photosynthesis and cell respiration are opposite processes. Photosynthesis releases oxygen, cell respiration uses that oxygen to release energy from food. Glycolysis occurs in the cell cytoplasm.Ĭomparing Photosynthesis and Cellular Respiration Photosynthesis removes carbon dioxide from the air, Cell respiration puts it back. It does not directly require or rely on oxygen. Oxygen and Energy Gylcolysis is an anaerobic process. The Krebs cycle and ETC are aerobic processes. Figure 9.1 Energy flow and chemical recycling in ecosystems (Campbell & Reece). Oxygen and Energy Pathways that require oxygen are aerobic. Photosynthesis removes carbon dioxide from the atmosphere, and cellular respiration puts it back. Cellular respiration is the process that releases energy from food in the presence of oxygen. Stages of Cellular Respiration three main stages: 1. 9.1 Cellular Respiration: An Overview Organisms get the energy they need from food. In symbols: 6 O2 + C6H12O6 6 CO2 + 6 H2O + Energy In words: Oxygen + Glucose Carbon dioxide + Water + Energy chemical energy in food must be released gradually, otherwise most of the energy would be lost in the form of heat and light. Overview of Cellular Respiration If oxygen is available, organisms can obtain energy from food by cellular respiration. 1000 calories = 1 kilocalorie, or Calorie. A Calorie is the amount of energy needed to raise the temperature of 1 gram of water by 1 degree Celsius. Cells break down food molecules and use the energy stored in the chemical bonds to produce compounds such as ATP that power the activities of the cell.Ĭhemical Energy and Food Energy stored in food is expressed in units of calories. Chemical Energy and Food Food provides living things with the chemical building blocks they need.
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