EBK LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 8220103935432
Author: Sadava
Publisher: MAC HIGHER
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Chapter 16.5, Problem 2R
Summary Introduction
To review:
The way in which the three-dimensional structure of mRNA (messenger ribonucleic acids) contributes to the regulation of its expression.
Introduction:
After transcription, the translation of mRNA can be controlled by the activities of proteins. To control the amount of protein formation, the cell regulates translation and the three-dimensional structure of mRNA also plays role in gene expression regulation.
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EBK LIFE: THE SCIENCE OF BIOLOGY
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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?arrow_forwardIs an entire chromosome made into an mRNA during transcription?arrow_forwardHow many amino acids will the mRNA sequence "AUG GAC CUG UCG UGA" produce?arrow_forward
- Describe some of the ways in which mRNAs might regulate gene expression. What is the role of poly(A) in mRNA stability? How might the cell regulate the stability Different mRNAs?arrow_forwardAfter the intron (which is in a lariat configuration) is released during pre-mRNA splicing, a brief moment occurs before the two exons are connected to each other. Which snRNP(s) hold(s) the exons in place so they can be covalently connected to each other?arrow_forwardHow do cells make a mature mRNA from a gene whose coding sequences are interrupted by introns?arrow_forward
- How is it possible that a given mRNA in a cell is found throughout the cytoplasm but the protein that it encodes is only found in a few specific regions of the cytoplasm? Cite a few different possibilities.arrow_forwardDescribe the various post-transcriptional and post-translational modifications that occur during the transition from pre-mRNA to mature protein.arrow_forwardWhat is the first anticodon recruited to an mRNA?arrow_forward
- How is the mRNA strand altered during mRNA processing (the intermediate step between transcription and translation)? How are these modifications helpful?arrow_forwardHow does RNA regulate gene expression? Specifically what is the pathway siRNA and miRNAs regulate gene expression? How are these pathways different?arrow_forwardDefine, explain, and differentiate between, the processes of transcription and translation. What enzymes or sub-cellular structures are responsible for carrying out these processes?arrow_forward
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