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APBio Campbell Chp 9
All the vocab words from APBio Campbell/Reece 7th ed. Chp 9
Term | Definition |
---|---|
Fermentation | a metabolic reaction that makes limited amount of ATP from glucose without an electron transport chain that produces a characteristic end product. |
Cellular respiration | the most prevalent and efficient catabolic pathway. In which oxygen is consumed as a reactant along with the organic fuel. |
Redox reactions | a chemical reaction involving the transfer of one or more electrons from one reactant to another. |
Oxidation | In the redox reaction, the loss of electrons from one substance is called oxidation. |
Reduction | the addition of electrons to another substance. |
Reducing agent | the electron Donner in a redox reaction. |
Oxidizing agent | the electron accepter in a redox reaction |
NAD | Nicotinamide adenine dinecleotide, a coenzyme present in all cells that helps enzymes transfer electrons during the redox reactions of metabolism. |
Electron transport train | a sequence of electron carrier molecules (membrane proteins) that shuttle electrons during the redox reactions that release energy used to make ATP. |
Glycolysis | The splitting of glucose into pyruvate. Glycolysis is the one metabolic pathway that occurs in all living cells, serving as the starting point for fermentation or aerobic respiration. |
citric acid cycle | A chemical cycle involving eight steps that completes the metabolic break down of glucose molecules to carbon dioxide; occurs within the mitochondrion; the second major stage in cellular respiration. |
Oxidation phosphorylation | The energy released at each step of the chain is stored in a form the mitochondrion can use to make ATP. |
substrate-level phosphorylation | A model if ATP synthesis occurs when an enzyme transfer s a phosphate group from a substrate molecule to ADP. |
Acetyl CoA | The entry compound for the citric acid cycle in cellular respiration formed from a fragment of pyruvate attached to a co-enzyme. |
cytochrome | an iron-containing protein, a component of electron transport chains in mitochondria and chloroplasts. |
ATP synthase | provide a port through which hydrogen ions diffuse into the matrix of a mitochondrion. |
chemiosmosis | An energy coupling mechanism that uses energy stored in the form of a hydrogen ion gradient across a membrane to drive cellular work. |
Proton-motive force | The potential energy stored in the form of an electrochemical gradient, generated by the pumping of hydrogen ions across biological membranes during chemiosmosis. |
Aerobic | Containing oxygen, referring to an organism, environment, or cellular process that requires oxygen. |
anaerobic | Lacking oxygen; referring to an organism, environment, or cellular process that lacks oxygen and may be poisoned by it. |
alcohol fermentation | The conversion of pyruvate to carbon dioxide and ethyl alcohol |
lactic acid fermentation | The conversion of pyruvate to lactate with no release of carbon dioxide |
facultative anaerobes | An organism that makes ATP by aerobic respiration if Oxygen is present but that switches to fermentation under anaerobic conditions. |
beta oxidation |