Question

Match the following operons (lac and trp) with the descriptions shown below:

Question 4 options:

12

The end product of the enzymatic pathway encoded by this operon acts as a corepressor of the operon

12

This operon codes for enzymes involved in a catabolic pathway(s)

12

This operon is inducible

12

This operon is controlled by a riboswitch

Match the following operons (lac and trp) with the descriptions shown below:

Question 4 options:

12

The end product of the enzymatic pathway encoded by this operon acts as a corepressor of the operon

12

This operon codes for enzymes involved in a catabolic pathway(s)

12

This operon is inducible

12

This operon is controlled by a riboswitch

Answer 1

tryptophan is the end product of the Trp operon and the cell does not have to produce Trp when Trp is present in the cell so the trp act as co-repressor, that is it binds to the repressor and activates it such that the repressor can bind the operator.

Lac operon is an inducible operon because when the inducer is present repressor is inactivated and operon is expressed. lac operon encodes enzymes required to breakdown lactose ( catabolic pathway) and Trp operon codes genes required for the synthesis of Trp ( anabolic pathway). Trp operon is controlled by riboswitch, which involves the formation of RNA hairpins so the answer is

The end product of the enzymatic pathway encoded by this operon acts as a corepressor of the operon - Trp operon

This operon codes for enzymes involved in a catabolic pathway(s)- Lac operon

This operon is inducible- lac operon

This operon is controlled by a riboswitch- Trp operon