In this article we will discuss about the theta structure of DNA, explained with the help of suitable diagrams. It is a structure formed in replication of circular DNA. Since this structure resembles the Greek letter θ it is known as the theta structure. Semiconservative mode of DNA replication in bacterial chromosome begins at the origin of replication called ori [...]
Genetic modification of rumen bacteria by using rDNA technology may improve the rate or extent of lignocellulolysis in the animal. The task of developing effective rDNA technology in rumen bacteria, particularly for improving lignocellulose digestion is complex. After the rate limiting steps have been defined, it is necessary to identify and clone suitable heterologous genes for insertion into a rumen [...]
In this article we will discuss about the properties of lac operon. Also learn about the role of cyclic AMP in lac operon. i) Products of all genes are transcribed in a single mRNA, called polygenic or polycistronic, starting from single promoter site. ii) mRNA of lac operon mol wt. 1.7 x 106 daltons is far greater than the need [...]