Biotechnology is basically a research oriented field that is combines biology and technology. The concept of biotechnology is is not new but if we talk about modern biotechnology then it is just three decades old. In biotechnology, microorganism performs number of functions to yield a new product from the old one. Different sets of technologies are used in modern biotechnology industry leading to better and improved variety of products. Among all one of the major advantage of biotechnology is to conserve the nature by replenishing its natural resources and saving energy in one form or the other.