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5 Written questions

5 Matching questions

  1. Describe a disulfide bond?
  2. What is hypertonic?
  3. What is facilitated diffusion and how does it work?
  4. Where is genetic coding found?
  5. Identify the layers of epithelium
  1. a A solution with a higher salt concentration than in the cells
    (cells shrink) LESS WATER THAN IN CELL
  2. b molecules move through a membrane from an area of greater concentration to an area of lesser concentration with the help of a carrier enzyme
    (Example: intake of glucose by most cells)
  3. c In the DNA of our chromosomes or our genome. It is found in the cell nucleus.
  4. d
  5. e covalent bond formed between two atoms of sulfur
    (ex: strand of hair maintains its shape)

5 Multiple choice questions

  1. synthesis reactions: bonds are formed to join two or more atoms to make a new compound
    (ex: proteins are sythesized by the bonding of many amino acids)
    decomposition reactions: bonds are broken and a large molecule is changed to two or more smaller ones
    (ex: digestion of starch into many smaller glucose molecules)
  2. C6H12O6
  3. A buffer system is a chemical or pair of chemicals that minimizes changes in pH by reacting with strong acids or strong bases
    (ex: buffer bonds to H+ ions when body fluid is becoming too acidic or release H+ ions when fluid becomes too alkaline)
  4. movement of molecules from an area of greater concentration to an area of lesser concentration along the concentration gradient. Very slow process. FOR MOLECULES
    (Example: exchange of gases in lungs or body tissues)
  5. Force or attraction between positive and negative charges that keeps atoms closely together

5 True/False questions

  1. What is the cell nucleus and what is its function?outer boundary of a cell made up of phospholipids, cholesterol and proteins.
    its main job is to protect the cell and acts as a barrier for communication and assists in transport


  2. What are the different kinds of bonding atoms?1. Chemical bonds
    2. Ionic bonds
    3. Covalent bonds
    4. Disulfide and Hydrogen bonds


  3. What is a gene?A genetic code for protein


  4. What is hypotonic?A solution with lower salt concentration than in the cells
    (cells burst) MORE WATER THAN IN CELL


  5. What is a positive feedback mechanism?the response to stimuli does not stop but rather keeps the sequence of events going. (requires an external brake)
    EX: cervical stretching during childbirth


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