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Chapter 8: The Cell Cycle

Practice Test
  1.DNA strands are parallel but run in opposite directions. What is this arrangement known as?  
  a.   opposite structure  
  b.   alternate structure  
  c.   antiparallel structure  
  d.   parallel structure  
  2.If checkpoint control proteins detect mistakes and damage during the cell cycle, the cell enters ________ so that repairs can be made.  
  a.   interphase  
  b.   cell-cycle arrest  
  c.   nuclear division  
  d.   cytokinesis  
  3.What is another term for mitosis?  
  a.   nuclear division  
  b.   cytokinesis  
  c.   interphase  
  d.   S stage  
  4.In DNA, the nitrogen base adenine only pairs with the nitrogen base _______ .  
  a.   guanine  
  b.   cytosine  
  c.   uracil  
  d.   thymine  
  5.What is the first step in the replication of DNA?  
  a.   unwinding of the double helix  
  b.   synthesis of a new matching strand for each existing strand  
  c.   binding of enzymes to existing DNA  
  d.   DNA polymerase makes a new strand to pair with undamaged strand  
  6.In what stage of the cell cycle are most cells found in adult multicellular organisms?  
  a.   G0  
  b.   S  
  c.   G2  
  d.   G1  
  7.What is the narrow point near the center of the chromosome by which sister chromatids are attached?  
  a.   metaphase plate  
  b.   centromere  
  c.   spindle  
  d.   kinetochore  
  8.Once mitosis and cytokinesis are complete, what part of the cell cycle do the daughter cells enter?  
  a.   prophase  
  b.   G0  
  c.   G1  
  d.   telophase  
  9.Which of these cells in the human body, when mature, do not normally divide?  
  a.   stem cells  
  b.   liver cells  
  c.   skin cells  
  d.   nerve cells  
  10.What is a DNA-protein complex that allows DNA molecules to fit into a cell's nucleus?  
  a.   nucleosome  
  b.   leading strand  
  c.   cytokinesis  
  d.   replisome  

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