Biochemistry: The Molecular Basis of Life
6th Edition
ISBN: 9780190209896
Author: Trudy McKee, James R. McKee
Publisher: Oxford University Press
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Chapter 18, Problem 34RQ
Summary Introduction
To review:
The way in which genes generate different products depending on the type of cell.
Introduction:
In eukaryotes, there are regions that are present but do not code for any protein and are known as the introns. To produce a mature protein, these sequences are removed from the mRNA (messenger ribonucleic acid) by the process known as splicing. Splicing is the process of removal of the intron from the exons. The removal of introns produces mature mRNA.
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Chapter 18 Solutions
Biochemistry: The Molecular Basis of Life
Ch. 18 - Prob. 1QCh. 18 - Prob. 2QCh. 18 - Prob. 3QCh. 18 - Prob. 4QCh. 18 - Prob. 5QCh. 18 - Prob. 1RQCh. 18 - Prob. 2RQCh. 18 - Prob. 3RQCh. 18 - Prob. 4RQCh. 18 - Prob. 5RQ
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- Question 2: Part a: Complete the table describing different components of intron removal from mRNA. Nu:, X and Y refer to B-type chemistry shown on the previous page. (YELLOW table shown) Part b: Complete the table describing different components of group I self-splicing intron removal from 26S rRNA in Tetrahymena. (BLUE table shown) Part c: Draw the intron with an all atom structure for Branchpoint A after intron removal from mRNA Part d: Draw the Group I self-splicing intron with an all atom structure for the Guanosine cofactor after intron removal from 26S rRNA in Tetrahymena.arrow_forwardQuestion 1 The creation of milk products such as cheeses and yogurts is dependent on the conversion by various anaerobic bacteria, including several Lactobacillus species, of lactose to glucose and galactose, ultimately producing lactic acid. These conversions are dependent on both permease and β-galactosidase as part of the lac operon. After selection for rapid fermentation for the production of yogurt, one Lactobacillus subspecies lost its ability to regulate lac operon expression. Would you consider it likely that in this subspecies the lac operon is “on” or “off”? What genetic events would likely contribute to the loss of regulation as described above? Question 2 Contrast the role of the repressor in an inducible system and in a repressible system.arrow_forwardWhy is correct?arrow_forward
- What are histone acetyltransferase (HAT) enzymes ?arrow_forwardAdenine is a niterogenous base or nucleosides?arrow_forwardAs we focused on the translation of mRNA into proteins as well as on protein structure and function. Along the way, we found many opportunities to consider the methods and reasoning by which much of this informationwas acquired. From the explanations given in the chapter,what answers would you propose to the following fundamentalquestion How do we know, based on studies of Neurospora nutritionalmutations, that one gene specifies one enzyme?arrow_forward
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