Transposons can be used in which of the following processes?

Which organism was used by Beadle and Tatum to propose the one gene-one enzyme hypothesis?

Select two correct statements from the four $(a-d)$ given below regarding the $lac$ operon.
$(A)$ Glucose or galactose may bind with the repressor gene and induce inactivity.
$(B)$ In the absence of lactose,the repressor binds with the operator region.
$(C)$ The $z$-gene codes for permease.
$(D)$ This was elucidated by Francois Jacob and Jacques Monod.
Which of the following are the correct statements?

Which of the following enzymes increases the permeability of the bacterial cell to lactose?

The lactose present in the growth medium of bacteria is transported to the cell by the action of

In an inducible operon, the genes are