Which of the following mechanisms of gene regulation is epigenetic? A) Different

Question

Which of the following mechanisms of gene regulation is epigenetic?

A) Different transcription factors bind to heart-specific and lung-specific enhancer regions to activate gene transcription in these tissues. B) A hormone binds to a transcription factor, making it able to bind DNA and activate transcription when sucrose is present. C) Tissue-specific patterns of nucleosome acetylation are established near a gene promoter early in development, and are perpetuated through subsequent rounds of cell division. D) 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.

Explanation / Answer

C) Tissue-specific patterns of nucleosome acetylation are established near a gene promoter early in development, and are perpetuated through subsequent rounds of cell division.

Epigenetics is the study of change in altered traits that are not caused by change in gene sequences. epigenetic changes generally result in altered exprssion of gene levels, these changes may be heritable or non-heritable. The changes of epigenetics may last through one,s life time and thus, they are carried to th next generation of cells by subsequencet divisions.

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