Biology 2010 Student Edition

Published by Prentice Hall
ISBN 10: 9780133669510
ISBN 13: 978-0-13366-951-0

Chapter 12, DNA - Standardized Test Prep - Page 389: 5



Work Step by Step

When the mRNA molecule is originally transcribed from the DNA molecule, both exons and introns are included. The final functional mRNA molecule results from the removal of introns from the molecule and then splicing together the leftover exons.
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