Polynucleotide structure. In DNA and RNA, the

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Polynucleotide structure. In DNA and RNA, the phosphodiester bridges link the 3’-hydroxyl of one nucleotide to the 5’-hydroxyl of the next.

What are we made of? The “Big Six” elements H, C, N, O, P, S What are the forms of these elements in “organic” matter? What makes a compound “organic”? Are all organic molecules formed from biological processes? What are early sources of organic matter on Earth? What is “life”? When did life begin?

CH2OH CHO CHO C=O HCOH CH2 HCOH HCOH HCOH HCOH HCOH HCOH CH2OH CH2OH CH2OH D-ribulose D-ribose 2deoxy-D-ribose The S C sugars