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DNA Structure - Overview 1 DNA Structure - Overview Class DNA and Cell Cycle Property DNA Deoxyribunucleic acid Linear polymer of nucleotide monomers Stores genetic information Fixed backbone of sugar-phosphate units (component of nucleotides) 2 strands of complementary and antiparallel DNA come together to form a double helix. Monomer of DNA 1 deoxyribose + 1 to 3 phosphate groups + 1 nitrogenous base 4 nitrogenous bases: Adenine, Thymine, Cytosine, Guanosine Purines Adenine and Guanine Double-ringed nucleotides Pyrimidine Thymine and Cytosine Single-ring nucleotides DNA STRUCTURE 1 phosphate between nucleotides Deoxyribose (or RNA ribose): nitrogenous base at C1, phosphate at C5, C3 has free OH Jan 11, 2021 1206 PM DNA Structure - Overview 2 5' end is the end: free phosphate group 3' end: free hydroxyl group Base-pairing Adenine-Thymine Guanine-Cytosine Generates the two-stranded, double helix structure of DNA
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