Question

____________ remain in mRNA. a. Introns b. Exons

   ____________ remain in mRNA.
a. Introns
b. Exons

Biology: The Unity and Diversity of Life

Biology: The Unity and Diversity of Life

Cecie Starr, Ralph… 12th Edition

Chapter 14, Problem 6

Instant Answer

Solved by Expert Christina Sorrentino

02/24/2021

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mRNA, or messenger RNA, is a type of RNA molecule that carries the genetic information from DNA in the nucleus to the ribosomes in the cytoplasm, where proteins are made. Show more…

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____________ remain in mRNA. a. Introns b. Exons

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Key Concepts

Exons

Exons are the regions of the pre-mRNA that code for proteins. During the splicing process of mRNA maturation, exons are retained and assembled to form the final coding sequence of the mature mRNA, as they contain the necessary instructions for protein synthesis.

Introns

Introns are the non-coding sequences present in the pre-mRNA that are removed during the mRNA processing stage called splicing. Although not included in the mature mRNA, introns may play roles in gene regulation and alternative splicing, which contributes to protein diversity.

mRNA Processing

mRNA processing refers to the series of modifications that a primary RNA transcript (pre-mRNA) undergoes to become a mature mRNA, ready for translation. This involves capping at the 5' end, adding a poly-A tail to the 3' end, and splicing, where non-coding regions are removed and coding sequences are joined together.

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