Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 14.4, Problem 1R
Summary Introduction
To review:
The reason and the process of pre-mRNA (precursor messenger ribonucleic acid) modification at the 5’-end and 3’-end of the transcript.
Introduction:
Transcription is the process of passing down the genetic information from deoxyribonucleic acid (DNA) molecule to RNA molecule. The process of transcription can be broken into three stages.
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What is the peptide encoded by this mRNA sequence 5’-UCU-GCA- AAU-UAA -GUU-3’?
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Chapter 14 Solutions
Life: The Science of Biology
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- Why is post translational modification important and Where does protein modification occur?arrow_forwardHow would a null mutation in the guanylyl transferase gene affect overall mRNA stability in eukaryotic cells?arrow_forwardHow is the mRNA strand altered during mRNA processing (the intermediate step between transcription and translation)? How are these modifications helpful?arrow_forward
- Consider the following mRNA base sequence 5' CUG-CAC 3' (a) What dipeptide is coded for by this mRNA? (b) What dipeptide is formed if a mutation converts CUG to CUU? (c) What dipeptide is formed if a mutation converts CAC to CGC? (d) What dipeptide is formed if a mutation converts CUG to CUU and CAC to CGC?arrow_forwardWhat is the total size of the mature i.e. fully processed mRNA in nucleotides? How many amino acids would the encoded protein be? Assume that the N- terminal Met encoded by the AUG start codon, is NOT cleaved from the protein?arrow_forwardWhat is the mRNA sequence of this DNA and in which direction will mRNA polymerase travel?arrow_forward
- Why do Introns in a pre-operational transcript differ in size and number?arrow_forwardWhat are the three modifications made to pre-mRNA molecules before they become mature mRNAs that are ready to be used in protein synthesis? What is the function of each modification?arrow_forwardWhat is the length in bp of the 5’ UTR, the mature processed mRNA and protein-coding region of the swo-1 mRNA?arrow_forward
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