BIOLOGY (LL)
5th Edition
ISBN: 9781264115495
Author: BROOKER
Publisher: MCG
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Chapter 12, Problem 1CQ
Summary Introduction
To explain: The reason by which the study of pathway leads to arginine synthesis allowed the conclusion that one gene sometimes encodes one enzyme by Beadle and Tatum.
Introduction: The one gene one enzyme concept was given by Beadle and Tatum. The concept emphasized about how a specific gene is specific for the synthesis of one enzyme. The specificity of gene expression was important to understand the mechanism behind the gene expression which later became the base of Human genome project and rDNA technologies.
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Define exon shuffling and explain why its occurrence might be an evolutionary advantage.
Neurospora crassa can synthesize the amino acid arginine from a
precursor as follows:
precursor
ornithine - citrulline arginine
George Beadle and Edward Tatum identified various mutants (arg
mutants) unable to synthesize arginine from this precursor. One such
class (Class I) could synthesize arginine if either ornithine or citrulline
was supplied. A second mutant class (Class II) could synthesize
arginine if citrulline was added, but not if ornithine was added. A
third class (Class II) could not synthesize arginine from either
ornithine or citrulline.
Which class or classes of arg mutants LACK a functional enzyme
able to convert ornithine into citrulline?
I are studying pancreatic islet cells and have isolated, cloned, and sequenced a novel protein that you postulate has 4 transmembrane segments.
Explain why the sequence would lead to this hypothesis (what procedure would I have applied).
Chapter 12 Solutions
BIOLOGY (LL)
Ch. 12.1 - What disease would result if a person inherited...Ch. 12.1 - Prob. 2CCCh. 12.1 - What is the direction of flow of genetic...Ch. 12.2 - Core Skill: Connections Look back at the role of...Ch. 12.3 - Prob. 1CCCh. 12.4 - Prob. 1CCCh. 12.4 - Prob. 1EQCh. 12.4 - Prob. 2EQCh. 12.4 - Prob. 3EQCh. 12.5 - Core Skill: Connections Look back at Figure 6.3,...
Ch. 12.5 - Prob. 2CSCh. 12.6 - Prob. 1CCCh. 12 - Which of the following best represents the central...Ch. 12 - A mutation prevents a gene from being transcribed...Ch. 12 - Prob. 3TYCh. 12 - Prob. 4TYCh. 12 - If a eukaryotic mRNA failed to have a cap attached...Ch. 12 - Prob. 6TYCh. 12 - Prob. 7TYCh. 12 - During the initiation of translation, the first...Ch. 12 - Prob. 9TYCh. 12 - Prob. 10TYCh. 12 - Prob. 1CQCh. 12 - Prob. 2CQCh. 12 - Prob. 3CQCh. 12 - Prob. 1COQCh. 12 - Prob. 2COQ
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