Activation of a gene via chromatin modification and remodeling can involve all of the following, except for what? acetylation of histones regulation of transcription termination recruitment of histone acetyl transferases movement or removal of nucleosomes
Added by Darlene G.
Close
Step 1
Step 1: Activation of a gene via chromatin modification and remodeling involves processes such as acetylation of histones, recruitment of histone acetyltransferases, and movement or removal of nucleosomes. Show more…
Show all steps
Your feedback will help us improve your experience
Nicholas Mogoi and 60 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Which of these mechanisms exerts gene control by suppressing transcription in eukaryotes? A. Acetylation of histone proteins B. Methylation of DNA C. Action of activator proteins
Adi S.
Modifications to chromatin can affect transcriptional activity by changing the accessibility of DNA to the transcription machinery. The given descriptions are examples of various processes that may or may not cause remodeling of chromatin. Match each description to the effect it has on transcriptional activity caused by chromatin remodeling. a. Activates b. Inactivates c. Activates and inactivates d. No effect 1. Histone methylation occurs at different amino acids. 2. A transcription factor binds an enhancer sequence. 3. Histone acetyltransferases attach acetyl groups to the N-terminus of histones. 4. Histone deacetylases remove acetyl groups from the N-terminus of histones.
Histone modifications are one major mechanism of eukaryotic gene regulation. Many different chemical modifications to histones are possible. Some cause increased expression while others decrease expression. Arguably the best understood histone modification is acetylation. a. What region of histone proteins is primarily targeted for chemical modifications, like acetylation, that contribute to changes in gene expression? Alpha helix region, loop region, or tail region? b. What is the effect of increased histone acetylation on patterns of gene expression? Transcription increases or decreases? c. Why does acetylating histones cause this change?
Shaiju T.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD