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Title: Which of the following mechanisms of gene regulation is epigenetic? Post by: laila046 on Nov 11, 2013 Which of the following mechanisms of gene regulation is epigenetic?
a. A transcriptional regulatory protein is produced only when phenylalanine levels are low, and binds to enhancer regions of genes involved in phenylalanine biosynthesis to activate their transcription. b. Tissue-specific patterns of nucleosome acetylation are established near a gene promoter early in development, and are perpetuated through subsequent rounds of cell division. c. Different transcription factors bind to heart-specific and lung-specific enhancer regions to activate gene transcription in these tissues. d. A hormone binds to a transcription factor, making it able to bind DNA and activate transcription when sucrose is present. Title: Re: Which of the following mechanisms of gene regulation is epigenetic? Post by: padre on Nov 11, 2013 b. Tissue-specific patterns of nucleosome acetylation are established near a gene promoter early in development, and are perpetuated through subsequent rounds of cell division. |