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What does it mean to say a gene is inducible? Repressible? Constitutively expressed? 

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Related questions

1-What is the purpose of a bacterial operon?

2-Describe the differences in gene expression control between a repressible and an inducible bacterial operon?

Which of the following is true of the lac operion?

A. This is an example of an inducible operon; by default, the structural genes are continually expressed (the operon is always ON until turned off).

B. This is an example of a repressible operon: by default, the structural genes are not expressed (the operon is always OFF until turned on).

C. This is an example of an inducible operon; by default, the structural genes are not expressed (the operon is always OFF until turned on).

D. This is an example of a repressible operon; by deafult, the structural genes are continually expressed (the operon is always On until turned off).

You have discovered the oil operon. The genes of theoil operon encode enzymes that allow bacteria to breakdown oil. The oil operon is only transcribed when bacteriaencounter oil in their environment.
(a) Is the oil
operon inducible or repressible? Why? (6 pts.)
(b) How do inducible and repressible operons differ from eachother?

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