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KCOGGS Test

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5 Written Questions

5 Matching Questions

  1. Why are plants healthier in hypotonic environments?
  2. What is passsive transport?
  3. What is feedback inhibition?
  4. What is a hypertonic solution?
  5. Are inhibitors always harmful?
  1. a A solution whose pH is higher than that of the cells, cell loses water, shrivels
  2. b Because plants have cell walls which make it harder for the solution to take effect, need more of it
  3. c No, enzyme inhibition often used for regulation cell metabolism
  4. d The diffusion of molecules across the biological membrane, requires no work
  5. e Most chemical reactions are organized into a series of steps, each catalyzed by an enzyme, to form certain product. If product is being over-made, then the product will act as an inhibitor to one of the enzymes in its pathway, called feedback inhibition (?)

5 Multiple Choice Questions

  1. A chemical reaction that releases energy, reactants covalent bonds contain more energy than products
  2. PM allows some substances to cross more easily than others
  3. When molecules are too big to pass through membrane, so they go through protein to be able to get to the other side
  4. Doesn't bind to active sight, binds to corner of enzyme, changes shape of active sight so substrate cannot bind
  5. The diffusion of water across a selectively permeable membrane

5 True/False Questions

  1. What is an isotonic solution?A solution whose pH is equal to that of the cell, the cell gains water as quickly as it loses it, stays the same

          

  2. How does active transport work?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

          

  3. What is a hypotonic solution?A solution whose pH is lower than that of the cells, cell gains water, pops

          

  4. How are enzymes like assembly lines?fluid mosaic of phospholipids and proteins

          

  5. How is a phospholipid structuredWith one phosphate group and two fatty acids, has hydrophilic head and hydrophobic tails

          

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