2) Attenuation of the trp operon is controlled by the formation of stem-loop structures in the mRNA of the trpl region. The attenuation function can be disrupted by mutations that alter the sequence of the repeat DNA regions 1-4 and prevent formation of the RNA stem loops. Describe the most likely effects on attenuation of each of the following mutation under the conditions specified. a. Mutation in region 1 and low levels of tryptophan: b. Mutation in region 2 and low levels of tryptophan: C. Mutation in region 2 and moderate levels of tryptophan (low enough to release the repression but enough to allow the ribosome to NOT pause):
2) Attenuation of the trp operon is controlled by the formation of stem-loop structures in the mRNA of the trpl region. The attenuation function can be disrupted by mutations that alter the sequence of the repeat DNA regions 1-4 and prevent formation of the RNA stem loops. Describe the most likely effects on attenuation of each of the following mutation under the conditions specified. a. Mutation in region 1 and low levels of tryptophan: b. Mutation in region 2 and low levels of tryptophan: C. Mutation in region 2 and moderate levels of tryptophan (low enough to release the repression but enough to allow the ribosome to NOT pause):
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
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Gene Interactions
When the expression of a single trait is influenced by two or more different non-allelic genes, it is termed as genetic interaction. According to Mendel's law of inheritance, each gene functions in its own way and does not depend on the function of another gene, i.e., a single gene controls each of seven characteristics considered, but the complex contribution of many different genes determine many traits of an organism.
Gene Expression
Gene expression is a process by which the instructions present in deoxyribonucleic acid (DNA) are converted into useful molecules such as proteins, and functional messenger ribonucleic (mRNA) molecules in the case of non-protein-coding genes.
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Transcribed Image Text:2) Attenuation of the trp operon is controlled by the formation of stem-loop structures in the mRNA
of the trpl region. The attenuation function can be disrupted by mutations that alter the sequence
of the repeat DNA regions 1-4 and prevent formation of the RNA stem loops. Describe the most
likely effects on attenuation of each of the following mutation under the conditions specified.
a. Mutation in region 1 and low levels of tryptophan:
b. Mutation in region 2 and low levels of tryptophan:
Mutation in region 2 and moderate levels of tryptophan (low enough to release the
repression but enough to allow the ribosome to NOT pause):
с.
d. Mutation in region 3 and low levels of tryptophan:
е.
Mutation in region 3 and moderate levels of tryptophan (low enough to release the
repression but enough to allow the ribosome to NOT pause):
f.
Mutation in region 4 and low levels of tryptophan:
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