<prompt> At which of the following levels the predominant regulation of gene expression of both prokaryotes and eukaryotes take place?DNA replicationTranscriptionTranslationPost-translational  <response>: Expression of a functional gene product from genes is the gene expression. The functional product is not always proteins. Non-protein coding genes are also expressed as functional RNAs tRNA, snRNA, miRNA etc. Regulation of gene expression occurs at transcriptional level in both prokaryotes and eukaryotes. 