17uno -...

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The following questions refer to Figure 17.1, a simple metabolic pathway: Figure 17.1   1) 
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Accordin g to Beadle and Tatum's hypothesis, how many genes are necessary for this pathway?  A) 
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B) 
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C) 
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D) 
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E) 
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It cannot be  determined from the pathway.  Answer:  
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Topic: 
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Concept 17.1  Skill: 
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Application/Analy sis
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2) 
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mutation  results in a defective enzyme  A.  Which of the following would be a consequence of that mutation?  A) 
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an accumulation of A and no production of B and C  B) 
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an accumulation of A and B and no production of C  C) 
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an accumulation of B and no production of A and C  D) 
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an accumulation of B and C and no production of A  E) 
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an accumulation of C and no production of A and B  Answer:  
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Topic: 
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Concept 17.1  Skill: 
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Application/Analy sis 
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3) 
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Which  component is  not  directly involved in translation?  A) 
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mRNA  B) 
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DNA  C) 
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tRNA  D) 
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ribosomes  E) 
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GTP  Answer:  
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B 4) 
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If A, B,  and C are  all required for growth, a strain that is mutant for the gene encoding enzyme  A  would be able to grow on  which of the following media?  A) 
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minimal  medium  B) 
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17uno -...

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