Lesson 5.3 - Glycolysis (1).pptx

Lesson 5.3 Cellular Respiration - Glycolysis 1 Do now: (you have 5 minutes) 1. What are the three stages of cellular respiration? 2. Where does each one take place? 2 Glycolysis Glucose + 2 ATP...

Lesson 5.3 Cellular Respiration - Glycolysis 1 Do now: (you have 5 minutes) 1. What are the three stages of cellular respiration? 2. Where does each one take place? 2 Glycolysis Glucose + 2 ATP + 2NAD+  4 ATP + 2NADH + 2 Pyruvic Acid Breakdown of Glucose Glucose (6C) is broken down into 2 molecules of pyruvic acid (2 X 3C molecules) 2 ATP must be used to get the reactions started. Citric Acid  ATP Production 2 ATP were used to START this reaction 4 ATP made (but we used 2 ATP), so it’s a net gain of 2 ATP -2 + 4 = 2 Citric Acid  NADH Production 4 high-energy electrons are passed to 2 NAD+ to become 2 NADH Remember: Each NAD+ can carry a pair of high-energy electrons to become NADH. NADH holds the high energy electrons until they can be transferred to the electron transport chain. ET C Citric Acid  Summary of Glycolysis The process of glycolysis is so fast that cells can produce thousands of ATP molecules in a few seconds. Glycolysis is anaerobic and takes place in the cytoplasm. Produces a net gain of 2 ATP, 2 NADH and 2 pyruvic acid. ET C Citric Acid  Glycolysis Citric Acid Cycle Electron Transport Chain Location Cytoplasm Aerobic or Anaerobic Anaerobic Glucose Starting C-based (6 Carbons) molecule 2 Pyruvate Ending C-based (3 Carbons each) molecule ATP Produced NET gain 2 ATP Electron Carriers 2 NADH Produced Other molecules produced Glycolysis Review Questions: Graded 1. What is the net gain of ATP from glycolysis? 1. 2 ATP per glucose 2. What is the carbon-based product of glycolysis? 2. 2 Pyruvate per glucose 3. Glycolysis end product will be further broken down in which step of 3. Citric acid cycle / Krebs cellular respiration? cycle 4. How many NADH molecules are produced in glycolysis? 4. 2NADH per 5. The NADH produced in glycolysis will be used in which stepglucose of cellular respiration? 5. Electron transport chain 6. Is glycolysis aerobic or anaerobic?