Chapter 9- Cellular Respiration: Harvesting Chemical Energy Flashcards
Campbell Biology 8th edition
Biology 1
Test 2
Terms : Hide Images [1]
| 98530394 | Fermentation | a partial degradation of sugars that occurs without the use of oxygen; a catabolic process | |
| 98530395 | Anaerobic respiration | a catabolic pathway in which oxygen is not consumed as a reactant along with the organic fuel | |
| 98530396 | Cellular respiration | the catabolic pathways of aerobic and anaerobic respiration, which break down organic molecules for the production of ATP; but it is also a synonym for aerobic respiration | |
| 98530397 | Aerobic Respiration | a catabolic pathway in which oxygen is consumed as a reactant along with the organic fuel; the most efficient catabolic pathway | |
| 98530398 | Oxidation | the loss of electrons from a substance | |
| 98530399 | Reduction | the addition of electrons to a substance | |
| 98530400 | Redox | oxidation-reduction reactions | |
| 98530401 | Oxidizing agent | the electron acceptor | |
| 98530402 | NAD+ | a coenzyme that can accept an electron and acts as an electron carrier in the electron transport chain | |
| 98530403 | Electron transport chain | A sequence of electron carrier molecules (membrane proteins) that shuttle electrons during the redox reactions that release energy used to make ATP | |
| 98530404 | Phosphorylation | refers to the process of a molecule being covalently bonded to a phosphate group | |
| 98530405 | Glycolysis | occurs in the cytosol, begins the degradation process by breaking glucose into two molecules of a compound called pyruvate | |
| 98530406 | Citric acid cycle | A chemical cycle involving eight steps that completes the metabolic breakdown of glucose molecules begun in glycolysis by oxidizing pyruvate to carbon dioxide; occurs within the mitochondrion in eukaryotic cells and in the cytosol of prokaryotes; the second major stage in cellular respiration | |
| 98530407 | Oxidative phosphorylation | the production of ATP using energy derived from the redox reactions of an electron transport chain; the third major stage of cellular respiration; electron transport and chemiosmosis; "industrial" way of making ATP | |
| 98530408 | Substrate-level phosphorylation | The formation of ATP by an enzyme directly transferring a phosphate group to ADP from an intermediate substrate in catabolism; occurs during glycolysis and the Krebs cycle | |
| 98530409 | Acetyl CoA | the entry compound for the citric acid cycle in cellular respiration, formed from a fragment of pyruvate attached to a coenzyme | |
| 98530410 | Coenzyme | An organic molecule serving as a cofactor (any nonprotein molecule or ion that is required for the proper functioning of an enzyme) | |
| 98530411 | FAD | an electron carrier; a coenzyme derived from riboflavin, a B vitamin | |
| 98530412 | Mitochondrial Matrix | the compartment in mitochondria that is enclosed by the intermembrane space | |
| 98530413 | Cristae | inner foldings of the inner membrane of mitochondria | |
| 98530414 | Intermembrane space | The narrow region between the inner and outer membranes of mitochondria | |
| 98530415 | Cytochrome | an iron-containing protein that is a component of electron transport chains in the mitochondria and chloroplasts of eukaryotic cells and the plasma membrane of prokaryotic cells | |
| 98530416 | Proton pump | An active transport protein in a cell membrane that uses ATP to transport hydrogen ions out of a cell against their concentration gradient generating a membrane potential in the process | |
| 98530417 | Proton gradient | a gradient formed by the difference in proton concentrations across a membrane | |
| 98530418 | Chemiosmosis | the process in which energy stored in the form of a hydrogen ion gradient across a membrane is used to drive cellular work such as the synthesis of ATP | |
| 98530419 | Electrochemical gradient | the diffusion gradient of an ion, which is affected by both the concentration difference of the ion across a membrane and the ion's tendency to move relative to the membrane potential | |
| 98530420 | Proton-motive force | the potential energy stored in the form of an electrochemical gradient, generated by the pumping of hydrogen ions across a biological membrane during chemiosmosis | |
| 98530421 | ATP synthase | A complex of several membrane proteins that provide a port through which protons diffuse. This complex functions in chemiosmosis with adjacent electron transport chains, using the energy of a hydrogen ion concentration gradient to make ATP; found in the inner mitochondrial membrane of eukaryotic cells and the plasma membrane of prokaryotic cells | |
| 98530422 | Obligate aerobe | An organism that requires oxygen for cellular respiration and cannot live without it | |
| 98530423 | Obligate anaerobe | An organism that only carries out fermentation or anaerobic respiration; such organisms cannot use oxygen and in fact may be poisoned by it | |
| 98530424 | Facultative anaerobe | an organism that makes ATP by aerobic respiration if oxygen is present but that switches to anaerobic respiration or fermentation if oxygen is not present | |
| 98530425 | Alcohol fermentation | a type of fermentation where the pyruvate is converted to ethanol (ethyl alcohol) in two steps | |
| 98530426 | Lactic acid fermentation | a type of fermentation where the pyruvate is reduced directly by NADH to form lactate as an end product, with no release of CO2 | |
| 98530427 | Beta oxidation | a metabolic sequence that breaks the fatty acids down to two-carbon fragments, which enter the citric acid cycle as acetyl CoA | |
| 98530428 | Mitochondrion | an organelle in eukaryotic cells that serves as the site of cellular respiration |