Q. Which of the following is not correct with respect to lac operon?
Solution:
The operon model of prokaryotic gene regulation was proposed by Jacob and Monod.
Operons are groups of genes, coding for related proteins and are arranged in units.
It is a single regulated unit having one or more structural gene, an operator, a promoter and a regulator gene.
Repressor protein in lac operon binds to the operator region and blocks the movement of RNA polymerase that binds to the promoter region. Thus, it prevents the expression of structural genes. This is an example of negative gene regulation.
Operons are groups of genes, coding for related proteins and are arranged in units.
It is a single regulated unit having one or more structural gene, an operator, a promoter and a regulator gene.
Repressor protein in lac operon binds to the operator region and blocks the movement of RNA polymerase that binds to the promoter region. Thus, it prevents the expression of structural genes. This is an example of negative gene regulation.