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AP Bio
Chapter 9 Vocab
| Question | Answer |
|---|---|
| fermentation | A catabolic process that makes a limited amount of ATP from glucose without an electron transport chain and that produces a characteristic end product, such as ethyl alcohol or lactic acid. |
| cellular respiration | The most prevalent and efficient catabolic pathway for the production of ATP, in which oxygen is consumed as a reactant along with the organic fuel. |
| redox reaction | A chemical reaction involving the transfer of one or more electrons from one reactant to another; also called oxidation-reduction reaction |
| reduction | The addition of electrons to a substance involved in a redox reaction. |
| NAD+ | Nicotinamide adenine dinucleotide, a coenzyme present in all cells that helps enzymes transfer electrons during the redox reactions of metabolism. |
| oxidative phosphorylation | The production of ATP using energy derived from the redox reactions of an electron transport chain. |
| substrate-level phosphorylation | The formation of ATP by directly transferring a phosphate group to ADP from an intermediate substrate in catabolism. |
| ATP synthase | A cluster of several membrane proteins found in the mitochondrial crista (and bacterial plasma membrane) that function in chemiosmosis with adjacent electron transport chains, using the energy of a hydrogen ion concentration gradient to make ATP. ATP synt |
| chemiosmosis | An energy-coupling mechanism that uses energy stored in the form of a hydrogen ion gradient across a membrane to drive cellular work, such as the synthesis of ATP. Most ATP synthesis in cells occurs by chemiosmosis. |
| aerobic | Containing oxygen; referring to an organism, environment, or cellular process that requires oxygen. |
| alcohol fermentation | The conversion of pyruvate to carbon dioxide and ethyl alcohol. |
| anaerobic | Lacking oxygen; referring to an organism, environment, or cellular process that lacks oxygen and may be poisoned by it. |
| lactic acid fermentation | The conversion of pyruvate to lactate with no release of carbon dioxide. |
| facultative anaerobe | An organism that makes ATP by aerobic respiration if oxygen is present but that switches to fermentation under anaerobic conditions. |