TRENDING NOW. 1  volunteer 'Someone who does something without being forced to do it'. 2  operationalize Bannon was removed from the National Security Council. 3  filibuster 'An effort to prevent action in a legislature'. 4  witch hunt Lookups spiked after the president used the phrase in a tweet.
Gene regulation can occur at any point during gene expression, but most commonly occurs at the level of transcription (when the information in a geneâs DNA is transferred to mRNA). Signals from the environment or from other cells activate proteins called transcription factors.ene regulation can occur at any point during gene expression, but most commonly occurs at the level of transcription (when the information in a geneâs DNA is transferred to mRNA). Signals from the environment or from other cells activate proteins called transcription factors.
Promoters are the sequences of DNA that determine when a gene is expressed. These sections of DNA sit in front of genes and provide a âlanding siteâ for transcription factors (proteins that switch gene expression on and off) and RNA polymerase (the protein that reads DNA and makes an mRNA copy).ll organisms make proteins in essentially the same way. The process starts with a gene â the âinstruction manualâ for constructing the protein. For this reason, the process of making a protein is also called gene expression. Gene expression has two main stages: transcription and translation.