The first step in in all living cells is , which can take place without the presence of molecular oxygen. If oxygen is present in the cell, then the cell can subsequently take advantage of via the to produce much more usable energy in the form of than any anaerobic pathway. Nevertheless, the anaerobic pathways are important and are the sole source of ATP for many anaerobic bacteria. Eukaryotic cells also resort to anaerobic pathways if their oxygen supply is low. For example, when muscle cells are working very hard and exhaust their oxygen supply, they utilize the anaerobic pathway to lactic acid to continue to provide ATP for cell function.
The term cellular respiration refers to the biochemical pathway by which cells release energy from the chemical bonds of food molecules and provide that energy for the essential processes of life. All living cells must carry out cellular respiration. It can be in the presence of oxygen or . carry out cellular respiration within the cytoplasm or on the inner surfaces of the cells. More emphasis here will be placed on where the are the site of most of the reactions. The energy currency of these cells is , and one way to view the outcome of cellular respiration is as a production process for ATP.
ATP & Respiration: Crash Course Biology #7 - YouTube
Function and Equation for Respiration
1. Click on the following links and use the information provided to write a definition of cellular respiration in your own words.2. Identify which living things carry out the process of respiration.3. Write the chemical equation for cellular respiration. Label the reactants and products. Where have you seen something like this equation before? Explain.4. How does the equation for cellular respiration compare with the equation for photosynthesis?5. What is ATP? Why is it an important product of cellular respiration?6. Using the same link from #5, write the chemical equation for the breakdown of ATP. Does the reaction release energy (exothermic) or absorb energy (endothermic)? Support your answer.7. Write the equation for the synthesis of ATP. Does the reaction release energy (exothermic) or absorb energy (endothermic)? Support your answer.
Use the following link to answer questions 8-10:
8. What is the main site of respiration in the cell?9. Make a sketch of the respiration organelle and label its parts.10. What energy molecules are produced in this respiration organelle?11. What is the difference between aerobic and anaerobic cellular respiration?12. Click on the �Cellular respiration� link and scroll down to fermentation. What is lactic acid fermentation? Where does it occur?13. What does a build up of lactic acid cause?14. What is alcoholic fermentation?15. In what industry is alcoholic fermentation important?16. Which produces the larger amount of energy � aerobic or anaerobic respiration? Support your answer with information from the reading.
17. Write a summary of cellular respiration. In your response:
Cycle of Photosynthesis and Respiration - VTAide
Anaerobic respiration (both glycolysis and fermentation) takes place in the fluid portion of the cytoplasm whereas the bulk of the energy yield of aerobic respiration takes place in the . Anaerobic respiration leaves a lot of energy in the ethanol or lactate molecules that the cell cannot use and must excrete.