BMS100 Past Test Questions
Chapter 2, Spring 2011
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  1. The "top four" elements of the body, when ranked by mass, are all of the following except
    1. oxygen
    2. hydrogen
    3. carbon
    4. calcium
    5. nitrogen

  2. To a chemist, an "organic" compound is
    1. any compound that was produced in nature, not in a lab
    2. any compound that contains carbon and hydrogen bonded to the carbon
    3. any compound that contains covalent bonds
    4. any compound that contains ionic bonds

  3. Which one of the following constitutes the lowest percentage of body weight?
    1. water
    2. carbohydrates
    3. protein
    4. fat

  4. Which statement best describes the sodium that is in body fluids?
    1. the sodium in body fluids is a positive ion with a net charge of +1
    2. the sodium in body fluids is a positive ion with a net charge of +2
    3. the sodium in body fluids is a negative ion with a net charge of -1
    4. the sodium in body fluids is a negative ion with a net charge of -2
    5. the sodium in body fluids is a neutral particle with no net charge

  5. A particle that has more electrons than it has protons would be
    1. an acid
    2. a base
    3. a positive ion
    4. a negative ion
    5. impossible (no such particle could exist)

  6. The correct symbol for the potassium that exists in body fluids is
    1. P+
    2. PO4-3
    3. K
    4. K+
    5. K-

  7. What is the importance of ions in body fluids?
    1. ions serve as enzymes that control metabolism
    2. ions are the direct source of energy that powers the "pumps" in membranes
    3. ions serve as messengers of genetic information within cells
    4. ions conduct the electrical signals needed for nerve and muscle function

  8. The chemical element nitrogen is present in
    1. glucose and other sugars
    2. cholesterol and other steroids
    3. ammonia and amino acids
    4. saturated fatty acids

  9. Which one of the following represents the most acidic solution?
    1. pH 2
    2. pH 5
    3. pH 7
    4. pH 10
    5. pH 14

  10. When molecules are mixed with water, _?_ bonds are likely to remain intact (unbroken).
    1. ionic bonds
    2. covalent bonds
    3. both of the above
    4. none of the above

  11. What molecules may be used as a source of fuel in the heart and in muscles?
    1. glucose
    2. fatty acids
    3. both of the above
    4. none of the above

  12. What molecules may be used as a source of fuel in the brain?
    1. glucose
    2. fatty acids
    3. both of the above
    4. none of the above

  13. Which one of the following is actually a long chain of glucose molecules?
    1. starch
    2. triglyceride
    3. saturated fatty acid
    4. polyunsaturated fatty acid

  14. In a person who is not a diabetic, what process occurs for several hours after consuming sugar?
    1. muscle cells and liver cells use enzymes to break down glycogen
    2. muscle cells and liver cells absorb glucose into their interiors
    3. both of the above
    4. none of the above

  15. True or false? If the blood sugar level is low, the only way to restore it to normal is to consume carbohydrates.
    1. True.
    2. False.

  16. At the chemical level, antibody molecules are _?_ molecules.
    1. protein
    2. triglyceride
    3. complex carbohydrate
    4. monounsaturated fatty acid

  17. Each different type of protein molecule consists of
    1. hundreds of amino acids, all of the same type
    2. a total of exactly twenty (20) amino acids
    3. hundreds of amino acids, of twenty (20) different types
    4. hundreds of monosaccharides, of twenty (20) different types

  18. Each triglyceride molecule includes
    1. three glucose units
    2. three glycerol units
    3. three fatty acids
    4. both A. and B.
    5. both B. and C.

  19. Triglycerides, such as fats and oils, contain more calories per gram than do
    1. carbohydrates
    2. protein
    3. both of the above
    4. none of the above

  20. A triglyceride that remains liquid even at very low temperatures is likely to contain a high proportion of
    1. cholesterol
    2. "trans" fatty acids
    3. saturated fatty acids
    4. polyunsaturated fatty acids

  21. Cholesterol is produced in _?_, then transported to other organs where it is further processed into _?_.
    1. the liver / complex carbohydrates
    2. the liver / hormones
    3. blood vessels / saturated fatty acids
    4. adipose tissue (fat) / triglycerides

  22. Which one of the following has the most complex three dimensional shape?
    1. steroid
    2. hemoglobin
    3. polysaccharide
    4. saturated fatty acid

  23. Which one of the following is a protein that helps maintain the structure of the body?
    1. glycogen
    2. collagen
    3. hemoglobin
    4. high density lipoprotein (HDL)
    5. low density lipoprotein (LDL)

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