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A: Chromatin is a complex of DNA and protein found in eukaryotic cells.
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A: Eukaryotes =Eu(true) +Karyon (nucleus). Organism with true nucleus is known as Eukaryotes.
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Q: Describe constitutive heterochromatin and facultative heterochromatin. Based upon this information,…
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Q: Explain how the acetylation of core histones may loosen chromatin packing.
A: DNA is the genetic element in all cell types of prokaryotic and eukaryotic. DNA is double stranded…
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Q: Define the following terms: a. histone b. heterochromatin c. spermine d. intergenic sequences e.…
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Q: Outline how histone methylation and acetylation affectchromatin structure
A: Gene expression may be done by the transcription of DNA into mRNA and formation of polypeptide…
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Q: Describe how chromatin-remodeling complexes alter nucleosomes.
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Q: Describe how reversible chemical changes to DNA and histones are linked to chromatin modification.
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Q: Why Most Genes in HeterochromatinRegions Are Silenced?
A: Chromatin is the DNA packed with its packaging proteins.
Give examples of constitutive and facultative heterochromatin in:
a. Drosophila
b. humans
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- Which of the following statements is NOT true about chromatin architecture? A. The histone tails on heterochromatin are deacetylated B. Heterochromatin is heavily methylated C. Euchromatin is more likely to contain genes that are expressed at that time D. Euchromatin is heavily methylatedBriefly describe a summary of the flow of genetic information in cells with diagram.Describe constitutive heterochromatin and facultative heterochromatin. Based upon this information, what would you predict would happen during the embryonic development of an organism if some regions of facultative heterochromatin were changed to constitutive regions? Answer in detail.
- Describe nucleosome supercoiling and its relationship to the radial loop–scaffold model of chromatin packaging.In eukaryotes which of the following combination of chromatin conditions would be most likely to result in the highest levels of expression of gene?Chromatin decompaction is a preliminary step in gene expression (Figure 29.48). How is chromatin decompacted?
- Describe constitutive heterochromatin and facultative heterochromatin. Based upon this information, what would you predict would happen during the embryonic development of an organism if some regions of facultative heterochromatin were changed to constitutive regions?Describe how chromatin remodeling complexes allowgene expression to occur.Define the following terms: a. histone b. heterochromatin c. spermine d. intergenic sequences e. tandem repeats
- Heterochromatin consists of a) region of euchromatin devoid of histones. b) an AT-rich region occurs every 200 base pairs. c) decondensed, transcriptionally active chromatin. d) highly condensed, transcriptionally inactive chromatinBriefly describe three ways that ATP-dependent chromatin-remodeling complexes may change chromatin structure.Describe how reversible chemical changes to DNA and histones are linked to chromatin modification.