Biomed 100 Practice Quiz
Chapter 2, Fall 2006
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Multiple Choice - One Correct Choice Per Question
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  1. Which one of the following is the smallest complete unit of a specific chemical element?
    1. neutron
    2. electron
    3. proton
    4. atom
      5.
    5. molecule

  2. The stability of an atom is determined mainly by...
    1. the size of the atom
    2. the number of neutrons in the nucleus
    3. it's ability to maintain a positive charge
    4. the number of electrons in the outermost shell
      5.
    5. the distance from the nucleus to the innermost electron shell

  3. When interacting with other atoms, an atom is likely to gain, lose, or share...
    1. neutrons
    2. protons
    3. electrons
      4.
    4. all of the above
    5. none of the above

  4. An ion is a particle that has...
    1. gained a proton
    2. lost a proton
    3. gained an electron
    4. lost an electron
    5. either C. or D.
      6.

  5. Which one of the following is not a chemical compound?
    1. water
    2. oxygen gas
      3.
    3. carbon dioxide gas
    4. phospholipids
    5. sodium chloride

  6. The pH of human blood is maintained at ...
    1. approximately 5.4
    2. approximately 6.4
    3. exactly 7.0
    4. approximately 7.4
      5.
    5. approximately 8.4

  7. The acidity of a solution is determined by...
    1. the concentration of hydrogen ions.
      2.
    2. the concentration of all positive ions.
    3. the concentration of all negative ions.
    4. the sum of all positive ions and negative ions.

  8. Which one of the following is the least soluble in water?
    1. positive ions
    2. negative ions
    3. hydrophilic compounds
    4. molecules with many polar covalent bonds
    5. molecules with many nonpolar covalent bonds
      6.

  9. Given the following key:
    1 = carbohydrates
    2 = triglycerides
    3 = electrolytes
    Which one of the following is in the correct sequence from greatest amount of potential energy to least amount of potential energy?
    1. 1-2-3
    2. 1-3-2
    3. 2-1-3
      4.
    4. 2-3-1
    5. 3-1-2

  10. _?_ and _?_ consist of many glucose units bonded together.
    1. starch and protein
    2. starch and glycogen
      3.
    3. starch and fatty acids
    4. glycerol and glycogen
    5. glycerol and fatty acids

  11. Triglycerides belong to a category of _?_ compounds known as _?_.
    1. organic / lipids
      2.
    2. organic / electrolytes
    3. organic / carbohydrates
    4. inorganic / lipids
    5. inorganic / fatty acids

  12. A saturated fatty acid and a polyunsaturated fatty acid are likely to differ in the amount of _?_ that each contains.
    1. carbon
    2. oxygen
    3. sodium
    4. hydrogen
      5.
    5. nitrogen

  13. Fatty acids are present in _?_ molecules.
    1. triglyceride
    2. phospholipid
    3. both of the above
      4.
    4. none of the above

  14. Of the items on the following list, the one with the most variable and complex three-dimensional shape is _?_.
    1. ions
    2. steroids
    3. amino acids
    4. polypeptides/proteins
      5.
    5. complex carbohydrates

  15. The steroid family of compounds includes...
    1. insulin
    2. cholesterol
    3. estrogen, progesterone and testosterone
    4. B. and C.
      5.
    5. all of the above

  16. A chemical element that is present in proteins and nucleic acids, but not in carbohydrates or lipids, is...
    1. carbon
    2. sodium
    3. oxygen
    4. hydrogen
    5. nitrogen
      6.

  17. In the human body, electrical currents are due to the flows of _?_.
    1. ions
      2.
    2. water
    3. steroids
    4. hormones
    5. the hydrophobic parts of phospholipid molecules

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