Biomed 100 Practice Quiz
Chapter 3, Fall 2006
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  1. Cytoplasm is...
    1. located within the cell nucleus
    2. located between the nucleus and the cell membrane
      3.
    3. located throughout all of a cell
    4. located in blood outside the blood cells
    5. located in solid tissues in the spaces between the cells

  2. Most of a cell membrane is a _?_ region that _?_ permeable to sugar, amino acid, and protein molecules.
    1. hydrophilic / is
    2. hydrophilic / is not
    3. hydrophobic / is
    4. hydrophobic / is not
      5.

  3. Mitochondria are _?_ that are involved in _?_.
    1. molecules / transfer of information from the nucleus to the cytoplasm
    2. organelles / efficient release of energy from fuel molecules
      3.
    3. cells / rapid production of additional cells in an embryo
    4. tissues / conduction of electrical signals

  4. _?_ and _?_ are two substances that can enter or leave cells without the aid of channels or transporters.
    1. ions and oxygen
    2. glucose and ions
    3. glucose and oxygen
    4. ions and carbon dioxide
    5. oxygen and carbon dioxide
      6.

  5. DNA replication and cellular growth occurs...
    1. prior to mitosis, during interphase
      2.
    2. during mitosis
    3. following mitosis, during cytoplasmic division
    4. at all of the times listed above
    5. at none of the times listed above

  6. When are chromosomes easily visible with a light microscope?
    1. during interphase
    2. during metaphase
      3.
    3. during all stages of the cell cycle
    4. none of the above (chromosomes are never easily visible with a light microscope)

  7. Differentiation results in cells having...
    1. different sequences of bases in their DNA
    2. different numbers of chromosomes
    3. different structures and functions
      4.
    4. all of the above
    5. none of the above

  8. In addition to phospholipids, membranes contain large amounts of...
    1. DNA
    2. RNA
    3. protein
      4.
    4. all of the above
    5. none of the above

  9. Which of the following are known to exist in human cells?
    1. protein channels that pass completely through a cell membrane
    2. microtubules (very small tubes) that move chromosomes and other structures within cells
    3. "messengers" that carry information from DNA in the nucleus to the rest of the cell
    4. all of the above are known to exist in human cells
      5.
    5. none of the above are known to exist in human cells

  10. True or false? All the cells of an individual's body come from cell lineages that include stem cells.
    1. True.
      2.
    2. False.

  11. The pressure (concentration) of oxygen gas in the blood that is passing through the brain is normally _?_ the pressure (concentration) of oxygen gas inside brain cells.
    1. greater than
      2.
    2. less than
    3. equal to

  12. One mitotic division produces _?_ daughter cells that _?_ genetically identical to each other.
    1. two / are
      2.
    2. two / are not
    3. 46 / are
    4. 46 / are not

  13. Enzymes, antibodies, and hemoglobin of blood are all composed primarily or entirely of...
    1. DNA
    2. RNA
    3. protein
      4.
    4. phospholipids
    5. complex carbohydrates

  14. In DNA, adenine (A) will normally bond with...
    1. guanine (G)
    2. thymine (T)
      3.
    3. cytosine (C)
    4. another adenine (A)
    5. any of the above

  15. Nucleic acids (DNA/RNA) contain information that is needed for the correct positioning of _?_ within protein molecules.
    1. fatty acids
    2. amino acids
      3.
    3. electrolytes
    4. phospholipids
    5. monosaccharides

  16. The "messengers" that carry information from DNA in the nucleus to the rest of the cell are composed of...
    1. RNA
      2.
    2. protein
    3. chromatin
    4. microtubules
    5. none of the above (there are no known "messengers" that carry information from DNA to the rest of the cell)

  17. Enzymes...
    1. are necessary for metabolism.
    2. recognize the shape of the specific substrate molecule with which they interact.
    3. both of the above.
      4.
    4. none of the above.

  18. _?_ molecules contain the energy that cells use directly for their for most of their immediate energy requirements.
    1. ADP
    2. ATP
      3.
    3. oxygen
    4. glucose
    5. phosphate

  19. True or false? Osmosis is involved in the balance of fluids between capillaries and the tissues outside of them.
    1. True.
      2.
    2. False.

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