16_test - Chapter 16 1 T 1 Whatdoes transform ation...

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Chapter 16 1
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T 1
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What does  transform ation  involve in  bacteria? 
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the creation of a  strand of DNA  from an RNA  molecule 
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the creation of a  strand of RNA  from a DNA  molecule 
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the infection of  cells by a phage  DNA molecule 
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the type of  semiconservativ e replication  shown by DNA 
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assimilation of  external DNA  into a cell  T
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C S
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K 2
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After  mixing a  heat - killed,  phosphore scent  strain of  bacteria  with a  living  non - phosphore scent  strain, you  discover  that some  of the  living  cells are  now  phosphore scent.  Which  observatio ns would  provide  the best  evidence  that the  ability to  fluoresce  is a  heritable  trait? 
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DNA passed  from the heat - killed strain to  the living strain. 
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Protein passed  from the heat - killed strain to  the living strain. 
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The  phosphorescenc e in the living  strain is  especially  bright. 
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Descendants of  the living cells  are also  phosphorescent. 
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Both DNA and  protein passed  from the heat - killed strain to  the living strain.  T
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In trying  to  determine  whether  DNA or  protein is  the  genetic  material,  Hershey  and Chase  made use  of which  of the  following  facts? 
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DNA contains  sulfur, whereas  protein does not. 
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DNA contains  phosphorus, but  protein does not. 
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DNA contains  nitrogen,  whereas protein  does not. 
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DNA contains  purines, whereas  protein includes  pyrimidines. 
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RNA includes  ribose, while  DNA includes  deoxyribose  sugars.  T
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K 4
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For a  science  fair  project,  two  students  decided to  repeat the  Hershey  and Chase  experimen t, with  modificati ons. They  decided to  label the  nitrogen  of the  DNA,  rather  than the  phosphate.  They  reasoned  that each  nucleotide  has only  one  phosphate  and two to  five  nitrogens.  Thus,  labeling  the  nitrogens  would  provide a  stronger  signal  than  labeling  the  phosphate s. Why  won't this  experimen t work?  A
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There is no  radioactive  isotope of  nitrogen. 
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Radioactive  nitrogen has a  half - life of  100,000 years,  and the material  would be too  dangerous for  too long. 
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Avery et al. have  already  concluded that  this experiment  showed  inconclusive  results. 
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16_test - Chapter 16 1 T 1 Whatdoes transform ation...

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