Presentation on theme: "Cellular Respiration & Fermentation. Aerobic Cellular Respiration The process that involves oxygen and breaks down food molecules to release useable energy…."— Presentation transcript:
Cellular Respiration & Fermentation
Aerobic Cellular Respiration The process that involves oxygen and breaks down food molecules to release useable energy…. ATP !!! Cellular Respiration happens in 3 steps 1. Glycolysis 2. Krebs Cycle 3. Electron Transport Chain
Cellular Respiration Creates molecules of ATP
The Chemical Pathways Cellular Respiration Flow Glucose GlycolysisKrebs cycle Electron transport Fermentation (without oxygen) Alcohol or lactic acid O 2 Present No O 2 Present
What is Cellular Respiration? Respiration Equation C 6 H 12 O O 2 6CO 2 + 6H 2 0 ***NoTiCe: This is the reverse equation for photosynthesis MUST HAVE OXYGEN PRESENT!
Where does Cellular Respiration Happen? Glucose Glycolysis Cytoplasm Electrons carried in NADH Pyruvic acid Krebs Cycle Electrons carried in NADH and FADH 2 Mitochondria Electron Transport Chain
Photosynthesis and Cellular Respiration The products of one reaction are the reactants of the other reaction. Photosynthesis Cellular Respiration
Sunlight energy Ecosystem Photosynthesis (in chloroplasts) Cellular respiration (in mitochondria) Useable energy Heat energy
Krebs Cycle & Electron Transport Chain
Under Anaerobic Conditions Fermentation Fermentation occurs in cells where oxygen can be a toxic element or is not present. NO O 2 present! “No O – No go!” (into Krebs Cycle/ETC)
2 Types of Fermentation If there is no oxygen, the pyruvate formed during glycolysis will be broken down again to either lactic acid or ethanol
Lactic Acid Fermentation Lactic acid Fermentation – fermentation that produces lactic acid Pyruvic acid + NADH lactic acid and NAD+ The NAD+ helps provide energy to keep glycolysis going. Occurs mostly in animals muscle cells & some bacteria Lactic acid burns! Muscles hurt!