Briefly explain WHY a 5 7-methylguanosine cap is only added to mRNA, not to tRNA or rRNA. (Please note that I am not looking for the function of the 5’ cap, but for the mechanism restricting capping to messenger RNA.)

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Briefly explain WHY a 5 7-methylguanosine cap is only added to mRNA, not to tRNA or
rRNA. (Please note that I am not looking for the function of the 5’ cap, but for the mechanism
restricting capping to messenger RNA.)

Expert Solution
Step 1

Introduction

DNA is a self replicating molecule. Transcription is a process by which mRNA is produced from DNA. In eukaryotes after formation of mRNA (messenger RNA) and it undergoes some modification called post transcriptional modification. Translation is a process where protein is synthesised from mRNA.

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