Part C Pictured below is the inducible soap operon of the Pseudomonas species gr

Question

Part C Pictured below is the inducible soap operon of the Pseudomonas species growing in the oncology ward. Imagine the operator has been damaged Operon Promoter operator Structural genes Regulatory gene 15 Template DNA Strand O Growth on soap would not change much, but the damage would increase the species' growth elsewhere. O Growth would decrease, both on soap and elsewhere. O Growth on soap would not change much, but the damage would decrease the species' growth elsewhere. O Growth on the soap would decrease, but the damage would not change the species' growth elsewhere. Submit Hints My Answers Give Up Review Part Part D order the correct sequence of events for the tryptophan repressible operon. The starting point is that tryptophan levels are low O Ask me anything

Explanation / Answer

Answer: (c) Growth on soap would not change much, but the damage would effect the species growth elsewhere.

When the operator has been damaged such that the active repressor no longer binds to it, the transcription of the structural genes continues. This is called constitutive mutation. This allows the bacteria to continuously utilize soap. The structural genes continues to express even in the absence of soap.

Since the bacteria has to spend extra energy in driving this constitutive expression, its other functions may get effected.

It should be apparent that the ‘enhanced activity’ has an unwarranted positive connotation. Activating mutations may result in more product, but they don’t result in something more valuable. Instead, there is a loss of control of a pre-existing biochemical pathway.

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