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11 Cards in this Set
- Front
- Back
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DNA Nucleotide Structure in terms of Sugar (deozyribose), Base and Phosphate |
Nucleotide is Composed of: - sugar deozyribose - a base (adenine, guanine, cytosine or thymine) - a phosphate group |
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Four Bases in DNA |
adenine, guanine, cytosine and thymine |
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DNA Nucleotide Linkage |
a covalent bond forms between the sugar of one nucleotide and the phosphate group of another nucleotide |
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The Formation of the Double Helix |
- DNA is comprised of two nucleotide strands - nucleotides are connected together by covalent bonds within each strand - the sugar of one nucleoride forms a covalent bond with the phosphate group of another - the two strands are connected by hydrogen bonds - found between the bases of the two strands of nucleotides |
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Complementary Base Pairing |
- adenine forms hydrogen bonds with thymine - guanine forms hydrogen bonds with cytosine |
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Nucleosome Function: |
help to supercoil the DNA |
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DNA Polymerases |
- can only add nucleorides to the 3 prime end of a primer |
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Primary Structure |
- the sequence and number of amino acids in the polypeptide |
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Secondary Structure |
formation of alpha helices and beta pleated sheets stabilized by hydrogen bonding |
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Tertiary Structure |
- furthur folding of the polypeptide stabilized by interactions between R groups |
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Quarternary Structure |
- exsists in proteins with more than one polypeptide chain |
