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Chapter 8: The Cell Cycle

Practice Test
  1.If checkpoint control proteins detect mistakes and damage during the cell cycle, the cell enters ________ so that repairs can be made.  
  a.   cytokinesis  
  b.   cell-cycle arrest  
  c.   interphase  
  d.   nuclear division  
  2.What is the first step in the replication of DNA?  
  a.   synthesis of a new matching strand for each existing strand  
  b.   unwinding of the double helix  
  c.   DNA polymerase makes a new strand to pair with undamaged strand  
  d.   binding of enzymes to existing DNA  
  3.What is another term for mitosis?  
  a.   cytokinesis  
  b.   interphase  
  c.   S stage  
  d.   nuclear division  
  4.What is the point at which the cell receives signals that tell it to commit to a full round of the cell cycle?  
  a.   division point  
  b.   premitosis  
  c.   G0  
  d.   restriction point  
  5.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  
  6.In DNA, the nitrogen base adenine only pairs with the nitrogen base _______ .  
  a.   uracil  
  b.   thymine  
  c.   guanine  
  d.   cytosine  
  7.What is any change in the sequence of a cell's DNA?  
  a.   a restriction  
  b.   a nuclear division  
  c.   a mutation  
  d.   a replication  
  8.DNA strands are parallel but run in opposite directions. What is this arrangement known as?  
  a.   antiparallel structure  
  b.   alternate structure  
  c.   parallel structure  
  d.   opposite structure  
  9.What are the stages of the cell cycle in which the cell grows and synthesizes RNA, proteins, and other macromolecules?  
  a.   S and GO  
  b.   G2 and S  
  c.   G1 and M  
  d.   G1 and G2  
  10.What is the enzyme that catalyzes the formation of the new DNA strands?  
  a.   kinase  
  b.   DNA polymerase  
  c.   histone  
  d.   cyclin  

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