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Cellular Respiration

Cellular Respiration . Cellular respiration . Respiration is the process by which organisms burn food to produce energy Reactant: Glucose Has energy stored in its chemical bonds Respiration converts the energy in glucose to a useable form . Cellular respiration .

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Cellular Respiration

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  1. Cellular Respiration

  2. Cellular respiration • Respiration is the process by which organisms burn food to produce energy • Reactant: Glucose • Has energy stored in its chemical bonds • Respiration converts the energy in glucose to a useable form

  3. Cellular respiration • Cellular Respiration produces ATP • Useable form of energy from glucose • ATP is a nucleic acid • Has 3 phosphate groups • Each P group is negative • Each bond in quite powerful, breaking the bond releases large amounts of energy • When the cell needs energy it releases a P by hydrolysis

  4. Cellular respiration • Respiration is the process for making ATP • 2 types of respiration • Anaerobic – no oxygen • Aerobic- oxygen • Both start with glycolysis

  5. Steps of cellular respiration • 1. Glycolysis • 2. Krebs cycle (aerobic and anaerobic cycle) • 3. Electron transport chain

  6. 1. Glycolysis • Takes place in the cytoplasm • ATP is used to split glucose molecules into a three carbon molecule called pyruvate • This splitting produces energy that is stored in ATP and NADH • A cell must invest 2 ATP to start reaction • C6H12O6 + 2ATP -> 2NAD+2pyruvate + 4ATP + 2NADH

  7. GLYCOLYSIS ________ ↓ ___________ → →_____________ ↓ ____________________ + _______________ GLUCOSE 2 PYRUVIC ACID ATP ATP ATP ATP NADH NADH 4 ATP’s 2 ATP’s PUT IN ________ and GET BACK __________ Net gain of ________ and __________ 2 ATP’s 2 NADH

  8. = ANAEROBIC PYRUVIC ACID MOVES TO NEXT STEP= Krebs cycle IF THERE IS NO OXYGEN(__________ _) IF THERE IS OXYGEN (_____________) = AEROBIC

  9. 2. Krebs cycle

  10. 2. Krebs Cycle • Aka citric acid cycle • After glycolysis the 2 pyruvate molecules goes to mitochondria • During which time pyruvate is broken down into a 2C molecule called acetate • The extra carbon is released as CO2 • Acetate attaches to a coenzyme A to form acetyl CoA and enters the Krebs cycle

  11. 2. Krebs cycle • Acetyl-CoA interacts with oxaloacetate to form citric acid • The citric acid is broken down in a series of 8 steps to take off Carbons and make new oxlacetate molecules • CO2 is given off • In the process of breaking up citric acid. Energy is produced • ATP, NADH, FADH2 (NADH and FADH2 got to electron transport chain)

  12. 3. Electron Transport Chain • The electron transport chain uses the high-energy electrons from the Krebs Cycle to convert ADP to ATP. • Total ATP 32.

  13. Cellular Respiration Totals • Gycolysis 2 ATP • Krebs Cycle 2 ATP • Electron Transport Chain 32 ATP • Total = 36 ATP

  14. Get a highlighter • In your notes highlight the following important key parts

  15. What you should know • Glycolysis is part of both aerobic and anaerobic respiration. • Glycolysis splits glucose, a six-carbon compound, into two pyruvate molecules, each of which has three carbons. • In glycolysis, a 2 ATP investment results in a 4 ATP payoff. • glycolysis takes place in the cytoplasm of the cell. • glycolysis does not require oxygen.

  16. What you should know • The Krebs cycle results in 2 ATP molecules for each glucose molecule run through glycolysis. • The Krebs cycle takes place in the mitochondrial matrix, the innermost compartment of the mitochondria. • The Krebs cycle is an aerobic process

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