Energy and Metabolism

ID #2336

Two options for "which of the following is correct about glycolysis" are: 1) It takes place in the cytoplasm of all living cells, which I know is true and is plainly on one of the lecture slides. and 2) Glucose is reduced over a series of steps into 2, 3carbon molecules called pyruvate and yields 2 molecules of ATP and 2 molecules of NADH per molecule of glucose, which is also shown in one of the lecture slides. Why is statement #2 false?


1) Yes, glycolysis occurs in the cytoplasm of all living cells. 
2) Is glucose reduced? Glucose is actually oxidized, not reduced. By the end of the Krebs Cycle glucose is completely oxidized to CO2 and H2O. Both Prof Mehrtens and your textbook described these oxidation steps and why a series of reactions is used to harvest energy form glucose instead of directly passing electrons to oxygen.

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