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6 Written Questions

6 Multiple Choice Questions

  1. The gain of electrons by a substance involved in a redox reaction; always accompanies oxidation
  2. Short for oxidation-reduction; a chemical reaction in which electrons are lost from one substance (oxidation) and added to another (reduction). Oxidation and reduction always occur together
  3. An organism that makes ATP by aerobic respiration if oxygen is present, but that switches to fermentation when oxygen is absent
  4. A cluster of several membrane proteins that function in chemiosmosis with adjacent electron transport chains, using the energy of a hydrogen ion concentration gradient to make ATP
  5. The metabolic cycle fueled by acetyl CoA formed after glycolysis in cellular respiration. Chemical reactions in the citric acid cycle complete the metabolic breakdown of glucose molecules to carbon dioxide. The cycle occurs in the matrix of mitochondria and supplies most of the NADH molecules that carry energy to the electron transport chains. The second major stage of cellular respiration.
  6. The conversion of pyruvate from glycolysis to carbon dioxide and ethyl alcohol

6 True/False Questions

  1. obligate anaerobesAn organism that only carries out fermentation; such organisms cannot use oxygen and also may be poisoned by it.

          

  2. oxidationThe gain of electrons by a substance involved in a redox reaction; always accompanies oxidation

          

  3. lactic acid fermentationThe conversion of pyruvate from glycolysis to carbon dioxide and ethyl alcohol

          

  4. substrate-level phosphorylationThe production of ATP using energy derived from the redox reactions of an electron transport chain; the third major stage of cellular respiration

          

  5. acetyl CoAThe gain of electrons by a substance involved in a redox reaction; always accompanies oxidation

          

  6. kilocaloriesa quantity of heat equal to 1,000 calories. Used to measure the energy content of food, it is usually called a "Calorie"

          

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