Life: The Science of Biology 11th Edition

Published by W. H. Freeman
ISBN 10: 1-31901-016-4
ISBN 13: 978-1-31901-016-4

Chapter 14 - From DNA to Protein: Gene Expression - 14.4 - Eukaryotic Pre-mRNA Transcripts Are Processed prior to Translation - 14.4 Recap - Learning Outcomes - Page 301: 3

Answer

To remove introns and splice exons together, RNA splicing occurs. This sequence is recognized and cut by an enzyme. Right after the pre-mRNA is transcribed, several small nuclear ribonucleoprotein particles (snRNPs) attach to both ends of each intron. Each particle has an RNA component referred to as the snRNA, which work together to ensure the redundant and irrelevant introns don't make it to the ribosome for polypeptide synthesis.

Work Step by Step

To remove introns and splice exons together, RNA splicing occurs. This sequence is recognized and cut by an enzyme. Right after the pre-mRNA is transcribed, several small nuclear ribonucleoprotein particles (snRNPs) attach to both ends of each intron. Each particle has an RNA component referred to as the snRNA, which work together to ensure the redundant and irrelevant introns don't make it to the ribosome for polypeptide synthesis.
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