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5 Written questions

5 Matching questions

  1. facilitated diffusion
  2. endergonic reaction
  3. active site
  4. enzyme
  5. feedback inhibition
  1. a A method of metabolic control in which a product of a metabolic pathway acts as an inhibitor of an enzyme within that pathway.
  2. b A protein (or RNA molecule) that serves as a biological catalyst, changing the rate of a chemical reaction without itself being changed into a different molecule in the process.
  3. c 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.
  4. d The passage of a substance through a specific transport protein across a biological membrane down its concentration gradient.
  5. e The part of an enzyme molecule where a substrate molecule attaches (by means of weak chemical bonds); typically, a pocket or groove on the enzyme's surface.

5 Multiple choice questions

  1. 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. The change in shape of the active site of an enzyme, induced by entry of the substrate so that it binds more snugly to the substrate.
  3. The principle of conservation of energy. Energy can be transferred and transformed, but it cannot be created or destroyed.
  4. The energy that matter possesses because of its location or arrangement. Water behind a dam and chemical bonds possess potential energy.
  5. The energy of motion; the energy of a mass of matter that is moving. Moving matter does work by imparting motion to other matter.

5 True/False questions

  1. coenzymeA protein (or RNA molecule) that serves as a biological catalyst, changing the rate of a chemical reaction without itself being changed into a different molecule in the process.

          

  2. hypertonic solutionReferring to a solution that, when surrounding a cell, will cause the cell to take up water.

          

  3. thermodynamicsThe study of energy transformation that occurs in a collection of matter. See first law of thermodynamics; second law of thermodynamics.

          

  4. pinocytosisCellular uptake of molecules or particles via formation of new vesicles from the plasma membrane.

          

  5. exergonic reactionAn 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.

          

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