Cellular Respiration Virtual Lab (ANSWER KEY) Test Your Knowledge! What do you already know? Where do cells get the energy to fuel Respiration? Cells get energy from food. What types of organisms use Respiration to make energy? Any organism that can break down food for energy can use Respiration - this includes all animals and plants. Hypothesize! What are the products of Photosynthesis that are required for Cellular Respiration? Cellular Respiration needs the Oxygen and Glucose from Photosynthesis in order to take place. Starter: Eukaryotic Cells Access the interactive using the link at the top of the page. This interactive is broken into two parts - you will need to move through the stages of the Photosynthesis simulation in order to access the stages of the Cellular Respiration simulation. What organelle is the site of Respiration? The Mitochondrion. Hypothesize! Why do you think animal cells only carry out Respiration, but plant cells can perform both Respiration and Photosynthesis? Animal cells lack chloroplasts and therefore lack the ability to carry out photosynthesis. Plant cells however have both organelles - the chloroplast to produce food from sunlight and the mitochondria to break down glucose for energy when sunlight is limited. The Mitochondrion The Mitochondrion is the main site of Cellular Respiration in cells. Label the structures in the mitochondrion below and give a brief description of each. Stages of Cellular Respiration The processes of Cellular Respiration can be separated into two stages: Glycolysis, Aerobic Respiration, & Fementation. Watch the interactive and observe how the molecules present move and change through these processes. What is the intermediary molecule that connects Glycolysis to Aerobic Respiration? Pyruvic Acid is the intermediary molecule. During Cellular Respiration, there are three processes that directly produce ATP. What are these processes and how much ATP do they yield? These three processes are Glycolysis - which yields 2 ATP, The Krebs Cycle - which yields 2 ATP, and the Electron Transport Chain - which yields 32 ATP. As you investigate the different stages of Cellular Respiration, use the information to complete the table below. Glycolysis Aerobic Respiration Where in the cell does it take place? Cytoplasm Mitochondria What is the main reactant? Glucose O2 (Oxygen) What are the main products? - CO2 (Carbon Dioxide) & H2O (Water) How much energy is produced? 2 ATP 34 ATP Fill in the chemical equation for Cellular Respiration based on the reactants and products seen in the interactive. Glucose + 6 O2 → 6 CO2 + 6 H2O In Cellular Respiration, the Electric Transport Chain is responsible for the bulk of ATP production. What is it about this process that results in so much energy and how does it create the waste products needed to fuel Photosynthesis in plant cells? The Electron Transport Chain produces so much energy due to the movement of electrons as Hydrogen ions and Oxygen combine to form water molecules. Not only is water one of the critical reactants for Photosynthesis, but this movement of electrons converts 32 molecules of ADP into ATP. Look at the ﬁnal possible stage of Respiration: Fermentation. How is this process different from Aerobic Respiration? When would this process be useful for cells? Fermentation, unlike Aerobic Respiration, does not require oxygen to take place. This could be beneﬁcial when the cell lacks sufﬁcient oxygen or during the production of certain molecules like ethanol.