Question
Help please Discuss the situations where an inducible operon is beneficial in contrast to a repressible...
Help please
Discuss the situations where an inducible operon is beneficial in contrast to a repressible operon.
Answers
An inducible gene gets expressed in the presence of a an inducer which can control the expression of one or more genes called to be structural genes those are involved in the metabolism or synthesis of target or inducer itself as substance. so see the lactose induces the expression of the lac genes which plays role lactose metabolism.
For example a certain antibiotic which induce the expression of a gene that leads to resistance to that antibiotic. presence of Inducer is common in metabolic pathways that itself catabolism pathway and acts as he substrate for the pathway.
Repressible genes turns off the expression of structural gene involved in the metabolism of that substance a co-repressor in the environment. For example e.g., Tryptophan represses the expression of the trp genes. biosynthesis of a substance example of repressible. so thi can not be beneficial.
so by above two reaction we can see the inducible pathway is quite beneficial.
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