Cellular Respiration, Lecture notes of Cell Biology

Download Cellular Respiration and more Lecture notes Cell Biology in PDF only on Docsity! CELLULAR RESPIRATION Learning Goals Unit Learning Goal: You can compare/contrast all components of photosynthesis & cellular respiration in terms of energy, organic and inorganic molecules as well as accurately diagram all the processes as part of the flow of energy and matter through all levels of organization in an ecosystem. Presentation Learning Goal(s): 1. You can identify organic & inorganic molecules of the process of cellular respiration and write out the equation using proper chemical notation. 2. You can compare the 2 stages of cellular respiration and identify the differences within fermentation using scientific vocabulary. 3. You can link the structure of the mitochondria to the process of cellular respiration. 4. You can describe the process of cellular respiration as a part of the biochemical pathway that facilitates the flow of energy and matter through all levels of organization in an ecosystem. Where does Aerobic CR take place? What is ATP? • Adenosine triphosphate (ATP) is the major source of energy for cells • formed when phosphate group and adenosine diphosphate (ADP) molecule bond • Present in all living cells Fig. 6.16 An overview of aerobic respiration What are the 2 conditions for CR? Oxygen present – Aerobic respiration • Majority of ATP created in this process • Takes place in organisms with large energy needs Oxygen absent – Anaerobic respiration • No ATP created • Lactic acid fermentation • Alcohol fermentation • Takes place in organisms with small energy needs Harvesting Chemical Energy Organic Compounds Glycolysis Fermentation Aerobic Respiration 36 ATP 2 ATP Without Oxygen What is Fermentation? • No oxygen present – anaerobic pathway • Occurs in the cytoplasm (cytosol) in eukaryotic and prokaryotic cells. • No ATP is created • Regenerates an electron carrier molecule that keeps glycolysis going = keeps ATP in production • Two types of fermentation • Lactic fermentation – large organisms • Alcoholic (Ethanolic) – small organisms Fermentation products Yogurt/bacteria Bread/fungus Soy sauce/fungus Pop Quiz What are the two types of fermentation? Lactic Acid and Alcohol Quick Write What are differences between aerobic and anaerobic cellular respiration? Krebs (Citric Acid) Cycle • Complex series of reactions only in aerobic respiration • Basically, sugar is broken down into energy carriers (NADPH, ATP) using energy derived from oxygen • CO2 is produced as waste at this step • Those energy carriers then drive the creation of most of the ATP in the electron transport chain in the mitochondria Energy Requirements • Present day unicellular organisms can acquire enough energy from anaerobic pathways • Large multicellular organisms must acquire energy from aerobic pathways. Do plants carry out cellular respiration? Yes! Cellular respiration does not mean breathing – it is breaking down organic compounds to release stored energy. Pop Quiz How are photosynthesis and cellular respiration related to one another? Products of photosynthesis are used as reactants of cellular respiration How does energy flow in an ecological system? Sun  Autotrophs  Heterotrophs Reflection Time: Learning Goals Ticket Out the Door: Rate yourself on one of the learning goals and summarize what you know about that learning goal. Make sure to write out the number of the learning goal. Presentation Learning Goal(s): 1. You can identify organic & inorganic molecules of the process of cellular respiration and write out the equation using proper chemical notation. 2. You can compare the 2 stages of cellular respiration and identify the differences within fermentation using scientific vocabulary. 3. You can link the structure of the mitochondria to the process of cellular respiration. 4. You can describe the process of cellular respiration as a part of the biochemical pathway that facilitates the flow of energy and matter through all levels of organization in an ecosystem. Reflection Time: Unit LG Scale 4 - You can compare/contrast all components of photosynthesis & cellular respiration in terms of energy, organic and inorganic molecules as well as accurately diagram all the processes as part of the flow of energy and matter through all levels of organization in an ecosystem. 3 - You can compare/contrast some components of photosynthesis & cellular respiration in terms of energy, organic and inorganic molecules as well as diagram most of the processes as part of the flow of energy and matter through all levels of organization in an ecosystem. 2 - You can explain some of the learning goal on your own but may need some help to complete the entire learning goal. 1 - You can answer questions about the learning goal but cannot give specifics using your own words.