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Human Heredity: Principles and Iss...

11th Edition
Michael Cummings
Publisher: Cengage Learning
ISBN: 9781305251052

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BuyFindarrow_forward

Human Heredity: Principles and Iss...

11th Edition
Michael Cummings
Publisher: Cengage Learning
ISBN: 9781305251052
Chapter 9, Problem 9QP
Textbook Problem
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What are the three modifications made to pre-mRNA molecules before they become mature mRNAs, are transported from the nucleus to the cytoplasm, and become ready to be used in protein synthesis? What is the function of each modification?

Summary Introduction

To determine: The three modifications made to pre-mRNA molecules before they become mature mRNA.

Introduction: A pre-mRNA contains both, coding and non-coding part known as exons and introns respectively. The pre-mRNA cannot be translated directly to produce polypeptides. They undergo a series of modification before the process of translation.

Explanation of Solution

The pre-mRNA transcripts have both introns and exons. Before leaving the nucleus, following modifications in pre-mRNA are made which are mentioned as follows:

  • • 5’ cap is added to the 5’ end of the mRNA...
Summary Introduction

To explain: The function of each modification.

Introduction: A pre-mRNA contains both, coding and non-coding part known as exons and introns respectively. The pre-mRNA cannot be translated directly to produce polypeptides. They undergo a series of modification before the process of translation.

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