High School Biology - Photosynthesis
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Metabolism includes catabolism and anabolism. Anabolism is the synthesis of complex molecules from precursors, while catabolism is the breakdown of complex molecules into smaller precursors from which they are synthesized. All these pathways involve biochemical reactions. Free energy describes whether a reaction will occur spontaneously. In metabolism, reactions which are spontaneous are favorable because these run automatically and release free energy. Every reaction has an activation energy which can be lowered down by enzymes. Enzymes do this by bringing the reactants closer together. ATP is the energy currency of all cells. Most of the reactions in the cell require ATP. A non-spontaneous reaction can be coupled to ATP hydrolysis reaction to enable the overall reaction release free energy and therefore become favorable. ATP is generated by cellular respiration, which contains fermentation (anaerobic respiration) and the Krebs cycle (aerobic fermentation).
Cellular respiration is a series of metabolic processes which all living cells use to produce energy in the form of ATP. In cellular respiration, the cell breaks down glucose to produce large amounts of energy in the form of ATP. Cellular respiration can take two paths: aerobic respiration or anaerobic respiration. Aerobic respiration occurs when oxygen is available, whereas anaerobic respiration occurs when oxygen is not available. The two paths of cellular respiration share the glycolysis step. Aerobic respiration has three steps: glycolysis, Krebs cycle, and oxidative phosphorylation. During glycolysis, glucose is broken down into pyruvate and produces 2 ATP. The Krebs cycle is also known as TCA cycle which contains a series of Redox reactions to convert pyruvate into CO2 and produce NADH and FADH2. During oxidative phosphorylation, NADH and FADH2 are used as substrate to generate a pH gradient on mitochondria membrane which is used to generate ATP via ATP synthase.
Anaerobic respiration contains two steps: glycolysis and fermentation. Fermentation regenerates the reactants needed for glycolysis to run again. Fermentation converts pyruvate into ethanol or lactic acid, and in the process regenerates intermediates for glycolysis.
Photosynthesis and Respiration Coloring Activity …
Importance of Photosynthesis
Photosynthesis is a process during which energy from light is harvested and used to drive synthesis of organic carbohydrates from carbon dioxide and water, generating oxygen. Photosynthesis is the only way that radiant energy from the sun can be converted into organic molecules for plants and animals to consume.
Respiration and photosynthesis made easy
This enrichment course is designed to help teenagers reflect on and clarify their goals for high school, map out detailed plans to reach them, and then put their plans into practice. Using real world case studies and videos on time management skills, students will learn how to shape new habits that will produce better results. This practical method will teach students to address stressful situations, sleep habits, social media distractions, etc., by prioritizing and working with intention. Lessons, activities and explorations will support the development of a lifelong skill of planning and thriving.
high school biology energy photosynthesis Study Sets …
While it was fascinating (and slightly embarrassing) to learn that we have known since 2003 that approximately 29 ATP molecules are produced per glucose, not 36-38, I must take issue with the connected statement that "Only about 30%the energy released by the cellular respiration of glucose is captured in the production of ATP..." Despite the drop from 40% to 30%, as is my understanding, CR, and ATP Synthase particularly, is still the most efficient engine as far as retaining energy not lost to heat on Earth.
Visual simulations for teaching science to high school students
Crime scene investigation scenarios have become a popular tool used to teach scientific concepts across a breadth of disciplines. Here we describe a lesson for high school students that uses a crime scene scenario toconvey the complex concept of isotopic fractionation of Carbon-13 across two photosynthetic pathways (C3 vs. C4), and how isotopic data are used by scientists today to study real world problems. This interdisciplinary activity links concepts in chemistry and biology. In addition, this activity demonstrates the importance of programs that foster collaborations between teachers and scientists.