BIOLOGY 1A03 Chapter Notes - Chapter 4: Cytosine, Ribose, Purine
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16 Nov 2014
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BIOLOGY 1A03 Full Course Notes
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~ consists of a phosphate group, a pentose (5c) sugar, and a nitrogenous base. ~ c#3 oh is involved in bonding with next molecule. Ribonucleotides include the purines (adenine and guanine) and the pyrimidines (cytosine and uracil) Deoxynucleotides include the purines (adenine and guanine) and the pyrimidines (cytosine and thymine) ~ joins the 5" carbon on the ribose of one nucleotide to the 3" carbon on the ribose of the other. When the nucleotides involved contain ribose, the polymer produces is called ribonucleic acid (rna) and when the nucleotides contain deoxyribose, the resulting polymer is deoxyribonucleic acid (dna) C o p o c. ~chain of phosphodiester linkages in a nucleic acts act as a backbone. One end has unlinked 5" carbon and the other has an unlinked 3" carbon. The sequence of bases (in dna and rna strand) is always written in 5" to 3" direction.
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