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5 Written questions

5 Matching questions

  1. energy coupling
  2. cofactor
  3. cellular respiration
  4. passive transport
  5. kinetic energy
  1. a The diffusion of a substance across a biological membrane, without any input of energy.
  2. b The energy of motion; the energy of a mass of matter that is moving. Moving matter does work by imparting motion to other matter.
  3. c In cellular metabolism, the use of energy released from an exergonic reaction to drive an endergonic reaction.
  4. d A nonprotein molecule or ion that is required for the proper functioning of an enzyme. See also coenzyme.
  5. e The aerobic harvesting of energy from food molecules; the energy-releasing chemical 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 (the electron transport chain and chemiosmosis).

5 Multiple choice questions

  1. The capacity to perform work, or to rearrange matter.
  2. An energy-releasing chemical reaction in which the reactants contain more potential energy than the products. The reaction releases an amount of energy equal to the difference in potential energy between the reactants and the products.
  3. Cellular "drinking"; a type of endocytosis in which the cell takes fluid and dissolved solutes into small membranous vesicles.
  4. An energy-requiring chemical reaction, which yields products with more potential energy than the reactants. The amount of energy stored in the products equals the difference between the potential energy in the reactants and that in the products.
  5. (1) A specific substance (reactant) on which an enzyme acts. Each enzyme recognizes only the specific substrate or substrates of the reaction it catalyzes. (2) A surface in or on which an organism lives.

5 True/False questions

  1. entropyA measure of disorder. One form of disorder is heat, which is random molecular motion.


  2. second law of thermodynamicsThe principle of conservation of energy. Energy can be transferred and transformed, but it cannot be created or destroyed.


  3. metabolismThe diffusion of water across a selectively permeable membrane.


  4. hypotonic solutionReferring to a solution that, when surrounding a cell, will cause the cell to lose water.


  5. endocytosisThe movement of materials out of the cytoplasm of a cell by the fusion of vesicles with the plasma membrane.


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