Question

Discuss the genetic control of enzyme activity with the help of operon model.

Answer 1

In genetics, an operon is a functioning unit of genomic DNA containing a cluster of genes under the control of a single promoter.The genes are transcribed together into an mRNA strand and either translated together in the cytoplasm, or undergo trans-splicing to create monocistronic mRNAs that are translated separately, i.e. several strands of mRNA that each encode a single gene product. The result of this is that the genes contained in the operon are either expressed together or not at all. Several genes must be co-transcribed to define an operon.

Answer 2

OPERONS MODEL

Operons model is a set of genes that are controlled by proteins .these genes may perform the function of activating the enzymes or represing them

Represive proteins impedes the decoding and transcription of RNAs from obeying the sequence

In this case if an inducer molecule is present then it blindes the impressor so that it cannot work with the operator