B the split 1 how many carbons are in each of the

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B. The Split: 1. How many carbons are in each of the subunits formed by “the split” (Step 4 of glycolysis)? 3 2. Why would the cell benefit from isomerizing (shuffling around the atoms of) one carbon subunit so that it is identical to the other carbon subunit? Can use same enzymes for both carbon subunits for rest of glycolytic pathway (more efficient). C. Energy Harnessing Phase: 1. How many total ATP are harnessed? 4 total 2. What is the net ATP gain from glycolysis? 2 net
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3. Which molecules are oxidized in this phase? Which molecules are reduced? • Glyceraldehyde 3 Phosphate is oxidized through phosphorylation (- G) • NAD+ reduced to NADH (+ G) • Enzyme: G3P dehydrogenase (G3PDH) D. Citric Acid Cycle (follows glycolysis under aerobic conditions): 1. What is the final carbon product of glycolysis? pyruvate 2. What must the product from Question D1 be converted to PRIOR to the Citric Acid Cycle? Acetyl CoA 3. Where in the cell does the Citric Acid Cycle occur? Mitochondria (matrix) 4. What is the net result of one turn of the Citric Acid Cycle? 3NADH, 1 GTP, 1FADH2, 2CO2 E. Fermentation (follows glycolysis under anaerobic conditions): 1. What is the product from Question D1 converted to in anaerobic conditions in muscle cells? Lactate. 2. Which molecules are oxidized and which are reduced in the reaction that forms the product in Question E1? Pyruvate is reduced to lactate (+ G); NADH is oxidized to NAD+ (- G).
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  • Fall '13
  • Talbot
  • Glucose, Adenosine triphosphate

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