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5 Written questions

5 Matching questions

  1. tonicity
  2. pinocytosis
  3. isotonic solution
  4. fluid mosaic
  5. exergonic reaction
  1. a A solution having the same solute concentration as another solution, thus having no effect on passage of water in or out of the cell.
  2. b A description of membrane structure, depicting a cellular membrane as a mosaic of diverse protein molecules embedded in a fluid bilayer made of phospholipid molecules.
  3. c Cellular "drinking"; a type of endocytosis in which the cell takes fluid and dissolved solutes into small membranous vesicles.
  4. d The ability of a solution surrounding a cell to cause that cell to gain or lose water.
  5. e 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.

5 Multiple choice questions

  1. The capacity to perform work, or to rearrange matter.
  2. The transfer of a phosphate group, usually from ATP, to a molecule. Nearly all cellular work depends on ATP energizing other molecules by phosphorylation.
  3. Thermal energy; the amount of energy associated with the movement of the atoms and molecules in a body of matter. Heat is energy in its most random form.
  4. Cellular "eating"; a type of endocytosis whereby a cell engulfs macromolecules, other cells, or particles into its cytoplasm.
  5. A property of biological membranes that allows some substances to cross more easily than others and blocks the passage of other substances altogether.

5 True/False questions

  1. osmoregulationMethod by which organisms regulate solute concentrations and balance the gain and loss of water.

          

  2. endocytosisCellular uptake of molecules or particles via formation of new vesicles from the plasma membrane.

          

  3. cofactorThermal energy; the amount of energy associated with the movement of the atoms and molecules in a body of matter. Heat is energy in its most random form.

          

  4. cellular respirationThe 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. hypotonic solutionReferring to a solution that, when surrounding a cell, will cause the cell to take up water.