Which of the following statements is not true of heterochromatin? It can be calculative or consecutive it is involved in X inactivation and mammals it is usually found at telemeters it is usually associated with transcription active genes it is present in eukaryotes but is not present in prokaryotes
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QUESTION 9 All of the following statements are true regarding X-chromosome inactivation in mammals, except: - All of the genes on an inactivated X-chromosome are transcriptionally silent. - Inactive X-chromosomes can be easily identified in mammalian cells. - The Barr body represents an inactive X-chromosome. - Inactive X-chromosomes have a different pattern of distribution of acetylated histone. QUESTION 10 Which of the following statements is true regarding heterochromatin? - It stains lightly when stained with Feulgen reagent. - It represents transcriptionally active regions of the chromosome. - Specialized chromatin structures (scs) can insulate genes from the effects of heterochromatin. - Euchromatic genes that are artificially placed next to heterochromatin are transcribed at abnormally high levels. - Heterochromatin is hypersensitive to DNAse I digestion.
Adi S.
Choose the correct statement: Euchromatin normally contains genes that are not expressed by a cell A nucleosome is composed by histones, but DNA does not form part of it Heterochromatin refers to highly condensed chromatin Barr bodies are present in male nucleus of mammalian cells
Marlyn J.
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