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5 Written questions

5 Matching questions

  1. What is this message-transfer process called?
  2. What is a concentration gradient?
  3. What is facilitated diffusion?
  4. What stops molecules from spontaneously breaking down into less energetic molecules?
  5. What is osmoregulation
  1. a The way of an plant/animal to prevent excessive uptake or excessive loss of water
  2. b The amount a substance can diffuse down to until it reaches equilibrium
  3. c signl transduction
  4. d The energy barrier
  5. e When molecules are too big to pass through membrane, so they go through protein to be able to get to the other side

5 Multiple choice questions

  1. Increasing the number of substrate molecules so theres less of a chance that the inhibitor will get to the active sight first
  2. The diffusion of water across a selectively permeable membrane
  3. Lipids, mostly phospholipids
  4. Forms a boundary between the living cell and its surroundings and controls the traffic of molecules into and out of the cell, takes up substances the cell needs and disposes of the cells wastes
  5. PM allows some substances to cross more easily than others

5 True/False questions

  1. What is a cellular metabolism?Every working cell in every organism caries out thousands of exer/endergonic reactions


  2. What type of reaction is this? burning of wood releases glucose molecules energy as heat and lightEndergonic reaction


  3. Why are plants healthier in hypotonic environments?Because plants have cell walls which make it harder for the solution to take effect, need more of it


  4. What is feedback inhibition?The way cells release energy, chemical process that uses oxygen to convert the chemical energy stored in fuel molecules to form chemical energy that the cell can use to perform work


  5. What is a non-competitive inhibitor?Doesn't bind to active sight, binds to corner of enzyme, changes shape of active sight so substrate cannot bind