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Exam (elaborations)
Campbell-Biology Chapter 18 Exam Q’s And A’s
NewCAMPBELL-BIOLOGY CHAPTER 18 EXAM Q’S AND A’S 
 
operator - answer- region of DNA within the promoter that controls RNA polymerase's access to a set of genes with related functions 
 
operon - answer- a unit of gene regulation and transcription in bacterial DNA that consists of a promoter, an operator, and one or more structural genes 
 
repressor - answer- a protein that binds to an operator and physically blocks RNA polymerase from binding to a promoter site. is specific to the operator ...
Exam (elaborations)
Campbell Biology Chapter 18 Exam with correct answers - Graded A+
PopularCampbell Biology Chapter 18 Exam with correct answers - Graded A+ 
 
Why is the lac operon said to be an inducible operon? 
When allolactose is present, it induces repression of gene expression. 
When activated, the lac operon induces repression of gene expression. 
When allolactose is present, it induces the activation of the lac repressor. 
When activated, the lac operon induces the production of lactose-digesting enzymes. 
When allolactose is present, it induces the inactivation of the lac re...