12) The top operon in E. coli is a group of genes that control the biosynthesis of tryptophan. Concerning regulation of trp operon true or false: Low levels of tryptophan in the cell inactivate the repressor and RNA polymerase cannot bind to the promoter site. In the absence of tryptophan, the repressor is active, and the structural genes are not transcribed. in the presence of tryptophan, the repressor is inactive, and the structural genes cannot be transcribed. High levels of corepressor tryptophan block transcription. Attenuation causes RNA polymerase to stop prematurely. ) The repressor of the trp operon is activated by the presence of lactose
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.
Please answer and explain the following true or false scenarios for the regulation of the trp operon.
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