Cellular Respiration No taxation without respiration! Cellular Respiration. What is it??? • The process by which organisms break down molecules like glucose, release the energy, and store it in ATP. • All living things must be able to store energy. • Three types of cell respiration • Anaerobic (no oxygen) • Aerobic (uses oxygen) • Most organisms do this one. • Fermentation (when you’re low on oxygen) Silly Spindle Songs • Science Rap Academy • https://www.youtube.com/watch?v=jq_honq8Qgk • Science Music Videos • https://www.youtube.com/watch?v=m9VTC9ZpRog • Mr Parr • https://www.youtube.com/watch?v=FHWbjnzfi_U Glycolysis • Occurs in the cytosol • Breaks down glucose (sugar) and creates pyruvate acids • Makes 2 energy molecules, or ATP • Makes 2 NaDH (two nucleotides with a phosphate) • Does NOT require oxygen Krebs Cycle • Occurs in the mitochondria • Breaks down pyruvate and creates citric acid • Makes 2 ATP • Makes NaDH and FaDH2 (energy carrying substrate) • Makes CO2 which is a waste product Electron Transport Chain • Occurs in the mitochondria • Uses NaDH and FaDH2 • Makes approximately 30 ATP • Requires oxygen as the final electron acceptor. • Oxygen strips the hydrogen off. Fermentation This is used when oxygen is not available • Lactic acid fermentation • • • • Happens in the cytosol Creates 2 ATP Lactic acid is a waste product Humans can do this • This is what is happening when your muscles burn after running or exercise. • Alcoholic fermentation • Happens in the cytosol • Creates 2 ATP • Alcohol and CO2 are waste products • Yeast and bacteria do this. Can I have a volunteer?
