AP Notes, Outlines, Study Guides, Vocabulary, Practice Exams and more!

Spliceosome

AP Biology Chapter 17 Notes Campbell/Reece

Subject: 
Rating: 
0
No votes yet

AP Biology Chapter 17 (17.3 and 17.4) 17.3 Eukaryotic cells modify RNA after transcription RNA Processing: in the nucleus ? before it is sent out to the cytoplasm. both ends of the primary transcript are altered certain interior sections are cut out A. Alternation of mRNA Ends (Figure 17.9) Both ends of the mRNA are modified in a particular way 5prime end ? 5prime cap made of modified form of a Guanine nucleotide 3prime end ? poly A tail - 50 to 250 Adenine (A) nucleotides are added. Remember, the mRNA is released soon after the signal AAUAAA is transcribed. So even more A is added on after that. Functions of 5prime cap and poly A tail: facilitate export of the mature mRNA from the nucleus protect the mRNA from degradation by hydrolytic enzymes.
Subscribe to RSS - Spliceosome

Need Help?

We hope your visit has been a productive one. If you're having any problems, or would like to give some feedback, we'd love to hear from you.

For general help, questions, and suggestions, try our dedicated support forums.

If you need to contact the Course-Notes.Org web experience team, please use our contact form.

Need Notes?

While we strive to provide the most comprehensive notes for as many high school textbooks as possible, there are certainly going to be some that we miss. Drop us a note and let us know which textbooks you need. Be sure to include which edition of the textbook you are using! If we see enough demand, we'll do whatever we can to get those notes up on the site for you!