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5 Cards in this Set
- Front
- Back
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chromatin structure
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negatively charged DNA loops twice around histone octamer core (H2A, H2B, H3 and H4 all positively charged) make nucleosome
H1 ties nucleosomes together in a string |
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Mitosis
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DNA condenses to form mitotic chromosomes
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Heterochromatin vs Euchromation
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Hetero - condensed, transriptionally inactive
Eu - less condensed, transcriptionally active Eu = true "truely transcribed" |
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Purines vs pyrimidines
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purines - A, G "ags are pure"; guanine has a ketone
pyrimidines - "Cut the PY" thymine has a meTHYl; deamination of cytosine makes a uracil |
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A-T; G-C bonding
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A-T has 2 H bonds
G-C has 3 H bonds increase G-C content and increase melting temperature |
