#040 Tryptophan Repressor

Describe a general sequence of steps for the function of an operon that is 'negatively' regulated. (Click here -  http://www.mun.ca/biology/scarr/bio4241_regulatoryproteins.htm - for support / additional notes.)

Describe what would occur in a typical bacterial cell in the absence of tryptophan.

Describe what would occur in a typical bacterial cell in the presence of tryptophan.  

Describe what would happen in a bacterial cell, given that the bacterial cell produces a mutated repressor with a conformational change in the site for binding trp.  

Describe what occurs in a typical bacterial cell, given the absence of lactose.  

Describe what occurs in a typical bacterial cell, given the presence of lactose. 

Describe what would happen in a bacterial cell, given that the bacterial cell produces a mutated repressor with a conformational change in the site for binding the promoter.

Identify the component of an operon to which RNA polymerase can bind and begin transcription.

• promoter

• repressor

• operator

• gene (coding sequence)