Presentation on theme: "Cellular Respiration and Fermentation"— Presentation transcript:
1Cellular Respiration and Fermentation Plant Biology 1
2Respiration and Fermentation Process of converting glucose to a useable form of energyRespiration uses Oxygen and is very efficientFermentation does not need Oxygen but is very inefficient
3ATP Adenosine Tri-phosphate A compound that “powers” the cell All cell parts need ATP to work properlyWithout ATP, the cell dies.
4Glycolysis, Cell respiration or fermentation ATPSo where can we get ATP?Glycolysis, Cell respiration or fermentation
5Glycolysis Cells cannot break down large compounds Glucose must be changed so the cell can use it.Through a series of chemical reactions, glucose is changed to pyruvic acidDuring this process, 6 molecules of ATP are produced (8 are produced, but 2 are used up)
6Pyruvic acidEnergy compound produced at the end of glycolysis
8Respiration (an aerobic process) Process of converting pyruvic acid to ATP in the presence of oxygenOne pyruvic acid molecule can produce 30 molecules of ATPBy-product of respiration is CO2 + H20Takes places inside each cell, in the mitochondria (organelle)
102 ATP’s usedGlucose8 ATP’s producedGlycolysisPyruvic AcidRespiration30 ATP’s producedCO2 and H2O
11What if there is no, or not enough oxygen? Fermentation
12Fermentation (an anaerobic process) Process of producing some ATP without oxygen presentMuch less efficientOnly 2 ATP’s are produced from each glucose moleculeAll cells are capable of fermentationTwo typesLactic Acid fermentationAlcoholic fermentation
13Lactic Acid Fermentation “Feeling the burn!”When a cell runs out of oxygen, it makes ATP by repeating the glycolysis process.Fermentation replaces a special compound lost during glycolysisFermentation does not produce ATP, but merely allows the cell to go through the glycolysis process repeatedly.
14Lactic Acid fermentation Fermentation uses sugar much faster than respirationThis is why exercise is better if your cells are functioning in this mode (anaerobic).Lactic acid and carbon dioxide are the by products of fermentation. If you produce them, your body must get rid of them quickly, or they can cause damage to your cells.
15Alcoholic Fermentation Similar to lactic acid fermentation, but the by-product is ethyl alcohol, instead of lactic acid, and carbon dioxideThe carbon dioxide produces the air spaces in bread, and the ethyl is the toxin that impairs brain function when consumed.
16Ethyl alcohol or lactic acid and CO2 2 ATP’s usedGlucose8 ATP’s producedGlycolysis2 ATP’s producedPyruvic AcidIs oxygen present?NoYesFermentationRespiration30 ATP’s producedEthyl alcohol or lactic acid and CO2CO2 and H2O
17Something to think about What is the advantage of aerobic respiration vs anaerobic?Why wouldn’t all cells just do aerobic?In what situations would anaerobic be better?