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6 Written questions

6 Multiple choice questions

  1. The formation of ATP by an enzyme directly transferring a phosphate group to ADP from an organic molecule
  2. An organism that only carries out fermentation; such organisms cannot use oxygen and also may be poisoned by it.
  3. Energy-coupling mechanics that uses the energy of hydrogen ion gradients across membranes to phosphorylate ADP; powers most ATP synthesis in cells
  4. The conversion of pyruvate to lactate with no release of carbon dioxide.
  5. 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
  6. The aerobic harvesting of energy from food molecules; the breakdown of food molecules, such as glucose, and the storage of potential energy in a form that cells can use to perform work; involves glycolysis, the citric acid cycle, and oxidative phosphorylation

6 True/False questions

  1. dehydrogenaseThe multistep chemical breakdown of a molecule of glucose into two molecules of pyruvate; the first stage of cellular respiration in all organisms; occurs in the cytoplasmic fluid


  2. citric acid cycleThe 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.


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


  4. intermediatesOne of the compounds that form between the initial reactant and the final product in a metabolic pathway, such as between glucose and pyruvate in glycolysis


  5. oxidative phosphorylationThe production of ATP using energy derived from the redox reactions of an electron transport chain; the third major stage of cellular respiration


  6. alcohol fermentationThe conversion of pyruvate from glycolysis to carbon dioxide and ethyl alcohol


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