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5 Written questions

5 Matching questions

  1. What are membranes made up of?
  2. What is the energy of activation?
  3. What is an example of an enzyme inhibitor?
  4. How are enzymes like assembly lines?
  5. What is the active sight?
  1. a A product from one catalyctic cycle becomes the substrate for the next, and so on down a chain of enzymes
  2. b The amount of energy the reactants must absorb to become active and start a chemical reaction/get over the energy barrier
  3. c Lipids, mostly phospholipids
  4. d Many poisons, pesticides, and drugs
  5. e The sight where the enzyme and substrate react together, specific because the active sight only fits one substrate

5 Multiple choice questions

  1. A specific reactant that an enzyme reacts on, fits into the active sight
  2. Every working cell in every organism caries out thousands of exer/endergonic reactions
  3. Doesn't bind to active sight, binds to corner of enzyme, changes shape of active sight so substrate cannot bind
  4. PM allows some substances to cross more easily than others
  5. Exergonic reaction

5 True/False questions

  1. cfThe tendency of a cell in a given solution to lose or gain water


  2. What is energy coupling?fluid mosaic of phospholipids and proteins


  3. How does osmosis work?The diffusion of water across a selectively permeable membrane


  4. What is passsive transport?Requires that a cell expends energy to move molecules across membrane against concentration gradient, low to high concentration, ATP supplies energy for most active transport


  5. What is active transport?The diffusion of molecules across the biological membrane, requires no work