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Chapter 8: The Cell Cycle

Practice Test
      
  1.Which of these cells in the human body, when mature, do not normally divide?  
  a.   liver cells  
  b.   stem cells  
  c.   nerve cells  
  d.   skin cells  
  Hint    
      
  2.In an eukaryotic cell, what controls the stages of the cell cycle?  
  a.   DNA polymerase  
  b.   kinases  
  c.   proteins called histones  
  d.   proteins called cyclins  
  Hint    
      
  3.Eukaryotic cell division is part of a complex series of stages in the life of a cell, called ____________ .  
  a.   circulation  
  b.   the life cycle  
  c.   homeostasis  
  d.   the cell cycle  
  Hint    
      
  4.Once mitosis and cytokinesis are complete, what part of the cell cycle do the daughter cells enter?  
  a.   G1  
  b.   telophase  
  c.   prophase  
  d.   G0  
  Hint    
      
  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  
  Hint    
      
  6.In DNA, the nitrogen base adenine only pairs with the nitrogen base _______ .  
  a.   uracil  
  b.   cytosine  
  c.   thymine  
  d.   guanine  
  Hint    
      
  7.In what stage of the cell cycle are most cells found in adult multicellular organisms?  
  a.   G2  
  b.   G0  
  c.   S  
  d.   G1  
  Hint    
      
  8.If checkpoint control proteins detect mistakes and damage during the cell cycle, the cell enters ________ so that repairs can be made.  
  a.   nuclear division  
  b.   interphase  
  c.   cell-cycle arrest  
  d.   cytokinesis  
  Hint    
      
  9.DNA synthesis requires DNA polymerase, an RNA synthesizine enzyme, and an enzyme that unwinds the double helix. What is the combination of these proteins and DNA called?  
  a.   a replisome  
  b.   chromatin  
  c.   a nucleosome  
  d.   replication origins  
  Hint    
      
  10.What is the enzyme that catalyzes the formation of the new DNA strands?  
  a.   cyclin  
  b.   histone  
  c.   DNA polymerase  
  d.   kinase  
  Hint    

 
   
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