A. The gene that regulates the production of the Lacl protein is found further upstream of the lac operon. Explain the potential ramifications to the functioning of the lac operon and the production of its products under the following conditions: a) A mutation is found in the Lacl gene b) A mutation is found in the second gene of the lac operon c) The RNA polymerase has difficulty binding to the promoter 3. 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
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.
![IV. Situational Questions
A. The gene that regulates the production of the Lacl protein is found further upstream of the lac operon. Explain the
potential ramifications to the functioning of the lac operon and the production of its products under the following conditions:
a) A mutation is found in the Lacl gene
b) A mutation is found in the second gene of the lac operon
c) The RNA polymerase has difficulty binding to the promoter
B. 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 respective operons. The data is shown below:
Level of protein
High
Transcription of gene 1
Transcription of gene 2
Molecule A
Low
Low
High
High
Low
High
Molecule B
High
High
low
low
Low
a) Determine whether molecule A and molecule B are inducers or corepressors. Justify your answers.
b) Identify which system resembles the lac operon system and which resembles the trp operons system](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F63e4a903-02af-464b-b0ef-6b361176f871%2Fed411f34-3be2-4a57-a3de-e80ae772ecab%2F4sup8gg_processed.png&w=3840&q=75)
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