A researcher was trying to determine whether two molecules (A and B) were corepressors or inducers in their respective operon systems. Data was collected regarding the levels of protein and the amount of gene transcription for the genes in their respectiver operons. The data is shown below. Level of protein Transcription of gene 1 Transcription of gene 2 low Molecule A High low Low high high Molecule B High high high Low low low a) Determine whether molecule A and Molecule B are inducers or corepressors. Justify your answer. b) Identify which system resembles the lac operon system and which resembles the trp operon system.

A researcher was trying to determine whether two molecules (A and B) were corepressors or inducers in their respective operon systems. Data was collected regarding the levels of protein and the amount of gene transcription for the genes in their respectiver operons. The data is shown below. Level of protein Transcription of gene 1 Transcription of gene 2 low Molecule A High low Low high high Molecule B High high high Low low low a) Determine whether molecule A and Molecule B are inducers or corepressors. Justify your answer. b) Identify which system resembles the lac operon system and which resembles the trp operon system.

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Description: A researcher was trying to determinewhether two molecules (A and B) werecorepressors or inducers in theirrespective operon systems. Data wascollected regarding the levels of proteinand the amount of gene transcription forthe genes in their respectiv

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter14: Gene Regulation

Section: Chapter Questions

Problem 11TYU

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Concept explainers

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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Question

A researcher was trying to determine
whether two molecules (A and B) were
corepressors or inducers in their
respective operon systems. Data was
collected regarding the levels of protein
and the amount of gene transcription for
the genes in their respectiver operons.
The data is shown below.
Level of protein
Transcription of gene 1 Transcription of gene 2
low
Molecule A
High
low
Low
high
high
Molecule B
High
high
high
Low
low
low
a) Determine whether molecule A and
Molecule B are inducers or corepressors.
Justify your answer.
b) Identify which system resembles the
lac operon system and which resembles
the trp operon system.

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A mutation that inactivates the repressor gene of the lac operon results in (a) the continuous transcription of the structural genes (b) no transcription of the structural genes (c) the binding of the repressor to the operator (d) no production of RNA polymerase (e) no difference in the rate of transcription
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