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Structural difference between purine and pyrimidines |
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Definition
Cut pie pyrimidine are ring like |
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What keeps the DNA together in a single polhmer |
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Where do the bonds happen on a sugar? |
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In what directing does the DNA code read? |
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What holds together the two strands of DNA |
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Definition
Hydrogen bonds between G-C and T-A. Is antiparallel |
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How many turns in a turn of a double helix |
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How many hydrogen bonds form between pairs? |
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Significance of base pairing? |
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Suggests mechanism for replicating while preserving genetic info. Prevents loss of information |
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A and b DNA are Right handed. Some left handed exists but function is unknown. (z-dna) |
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How much DNA makes up protein coding genes? |
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Non functional remnants of genes |
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Each cell contains 2 meters of DNA. How does it all fit? |
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Definition
140 bp of DNA wraps around Histonesand are called Nucleosomes |
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When Histone form together what is made? |
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Heritable changes the phenotype or gene expression caused by mechanisms other than the DNA sequence. |
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What are the mechanisms of epigenetic |
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Definition
Post-translational modification of Hiltons. methylation of DNA |
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