4.11: Gene Expression Difficulty Level: At Grade Created by: CK-12 Estimated4 minsto complete % Progress Practice Gene Expression Practice Progress Estimated4 minsto complete % Practice Now Share Add to Library Turn In Read Practice Resources Details Loading... Notes/Highlights Having trouble? Report an issue. Color Highlighted Text Notes Show More Vocabulary Language: English ▼ English Spanish activator Regulatory protein that enhances the interaction between RNA polymerase and a particular promoter. cis-regulatory element Regulatory segment of DNA; site where a transcription factor may bind. enhancer Sites on the DNA strand that are bound by activators; brings a transcription factor to the initiation complex. initiation complex Complex composed of RNA polymerase and transcription factors; needed for transcription to begin. regulatory protein DNA-binding protein that regulates gene expression. repressor Proteins that bind to non-coding sequences on DNA that are close to the promoter region; impedes RNA polymerase's progress along the strand. transcription factor A DNA-binding protein involved in regulating gene expression. Image Attributions Show Hide Details Description Describes how gene expression is regulated. Learning Objectives None Related Materials Regulation of Gene Expression Mechanisms - Advanced Difficulty Level: At Grade Authors: Douglas Wilkin, Ph.D. Jean Brainard, Ph.D. Tags: activator Gene Expression regulatory protein (3 more) repressor SCI.BIO.329.1.L.1 transcription factor Subjects: science Biology Concept Nodes: SCI.BIO.329.1 (Gene Expression) Grades: 9 , 10 Date Created: Feb 24, 2012 Last Modified: Aug 28, 2016 Vocabulary None Save or share your relevant files like activites, homework and worksheet.To add resources, you must be the owner of the Modality. Click Customize to make your own copy.