For the following questions, describe the expression levels of the structural genes in the Trp operon under the conditions described. In the absence of tryptophan, the structural genes will: [ Select ] ["No longer be expressed", "Be constantly expressed", "Be deleted from the operon"] In the presence of tryptophan, the structural genes will: [ Select ] ["No longer be expressed", "Be constantly expressed", "Be deleted from the operon"] In the absence of tryptophan and the promoter sequence was mutated such that the RNA polymerase can no longer bind, the structural genes will: [ Select ] ["No longer be expressed", "Be constantly expressed", "Be deleted from the operon"]
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.
For the following questions, describe the expression levels of the structural genes in the Trp operon under the conditions described.
In the absence of tryptophan, the structural genes will:
[ Select ] ["No longer be expressed", "Be constantly expressed", "Be deleted from the operon"]
In the presence of tryptophan, the structural genes will:
[ Select ] ["No longer be expressed", "Be constantly expressed", "Be deleted from the operon"]
In the absence of tryptophan and the promoter sequence was mutated such that the RNA polymerase can no longer bind, the structural genes will:
[ Select ] ["No longer be expressed", "Be constantly expressed", "Be deleted from the operon"]
The trp operon is a group of genes which are essential for synthesis of tryptophan. It includes regulatory gene, structural gene, promoter and operator genes.
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