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\\\\\\\\\\\\\\\\\\\\\\\\\	Phosphate	Five Carbon Sugar	Nitrogenous Bases
DNA	present	deoxyribose	cytosine, thymine, adenine and guanine
RNA	present	ribose	cytosine, uracil, adenine and guanine

 

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2.  Purine bases = adenine and Guanine 
     Pyrimidines bases = DNA: Cytosine and Thymine 
                                    RNA: Cytosine and Uracil 

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3.  Double bond:  Purines 
     Single bond:  Pyrimidines 

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4.  Thymine is the complementary base attracted to adenine in RNA. 

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5.  The upper and lower chains are phosphate and sugar (Deoxyribose) with nitrogen bases.  Two strains of nucleotide polymers are held together by weak hydrogen bonds between Adenine and Guanine  and Cytosine and Thymine. 

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6.  ATTAGGCCAATCGCG 
     TAATCCGGTTAGCGC 

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7.  AAGGCGUAUCG is a RNA polynucleotide.  Uracil is in the place of thymine. 

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8.  RNA polynucleotide.  The sugar is ribose and not deoxyribose. 

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