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Metabolism - Glycolysis and Fermentation
Biology 200 Lecture Notes
16
Biology
Undergraduate 2
07/20/2011

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Term
What are the two phases of glycolysis called?
Definition
Energy investment, energy payoff.
Term
What does glycolysis begin with?
Definition
An energy-investment phase of 2 ATP per glucose.
Term
What is produced during the energy payoff phase?
Definition
4 ATP are produced.
Term
What is the net gain of ATP/glucose during glycolysis?
Definition
2 ATP.
Term
For aerobic eukaryotes, how many ATP are produced from metabolism?
Definition
29 ATP/glucose.
Term
Feedback inhibition
Definition
Occurs when the product of a metabolic pathway inhibits an enzyme that is active early in the pathway.
Term
Carbon dioxide cannot be removed from the mitochondria, which process is likely to shut down first? Glycolysis, the linking step, the Krebs cycle, or the Electron Transport Chain?
Definition
Linking Step
Term
Anaerobic Respirators
Definition
Without oxygen; Using NO3- or SO4 2- as the final electron acceptor.
Term
Chemolithotrophs
Definition
Break down inorganic molecules; use this energy to drive respiration.
Term
Fermenters
Definition
Make ATP without the ETC.
Term
Fermentation Pathways
Definition
Allows cells to make ATP and regenerate NAD+ without oxygen.
Term
Glycolysis
Definition
Glucose is processed to pyruvate through the glycolysis reactions in the cytoplasm.
Term
Linking Step
Definition
Pyruvate is transferred to the mitochondria and transformed into the sticky 2-C Acetyl CoA.
Term
Krebs Cycle
Definition
Acetyl-CoA feeds the Krebs cycle, which uses the oxidation of carbohydrates to form reducing power (as NADH, FADH2).
Term
Electron Transport Chain
Definition
High-energy electrons are driven through membrane proteins that pump protons to produce a gradient, with oxygen acting as the final electron acceptor in most organisms.
Term
Oxidative Phosphorylation
Definition
ATP synthase uses gradient energy to catalyze the formation of the energy currency of the cell, ATP.
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