BMS107 Past Test Questions
Chapter 2, Spring 2010

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1. How many distinct layers of phospholipid "heads" exist in a typical plasma membrane?
   1. one (1)
   2. two (2)
   3. 25,000
   4. zero (plasma membranes do not contain any phospholipid "heads"
   
   
2. Interstitial fluid is located
   1. completely inside cells
   2. completely outside cells
   3. between the two layers of phospholipids in a plasma membrane
   4. in cavities or spaces that are devoid of cells
   
   
3. Of the structures on the following list, the one that is least involved in protein synthesis and processing is
   1. ribosomes
   2. the Golgi apparatus
   3. smooth endoplasmic reticulum
   4. rough endoplasmic reticulum
   
   
4. Structures that are moved within a cell by microtubules include
   1. vesicles
   2. chromosomes
   3. both of the above
   4. none of the above (no structures are known to move within cells)
   
   
5. At any moment, most cells in the body are in the phase of the cell cycle known as
   1. mitosis
   2. cytokinesis
   3. interphase
   
   
6. Following DNA replication, the two sister chromatids separate from each other
   1. before the chromatin condenses into dense chromosomes
   2. after the chromosomes "line up" at the cell equator
   3. both of the above
   4. none of the above
   
   
7. While not coiled into dense, visible chromosomes, DNA exists in a form known as
   1. vesicles
   2. ribosomes
   3. chromatin
   4. microtubules
   
   
8. Within a plasma membrane, the hydrophobic region
   1. contains the "heads" of phospholipid molecules
   2. contains the "tails" of phospholipid molecules
   3. is directly in contact with intracellular fluid
   4. is directly in contact with extracellular fluid
   
   
9. Secretory vesicles
   1. are surrounded by a phospholipid membrane that interacts with the plasma membrane
   2. are surrounded by a phospholipid membrane that does not interact with the plasma membrane
   3. must enter the rough endoplasmic reticulum for processing before they become fully functional
   4. become visible and functional only during mitosis
   
   
10. Although often called "cell division," mitosis most properly refers to division of
    1. cilia
    2. ribosomes
    3. the nucleus
    4. the cytoplasm
    
    
11. Processing of lipid substances (including phospholipids), and detoxification of harmful substances, occur to the greatest extent in
    1. mitochondria
    2. lysosomes
    3. rough endoplasmic reticulum
    4. smooth endoplasmic reticulum
    
    
12. One division of one stem cell typically results in the production of
    1. two stem cells
    2. two progenitor cells
    3. one stem cell plus one progenitor cell
    4. two stem cells plus two progenitor cells
    
    

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