Introduction- Studying growth of a microorganism is the basis of biotechnological exploitation of microflora for production of desired product. Optimization of growth of microorganism in a particular media is desirable due to economical and availability of particular growth constituent in a region. Despite this, some microorganisms have specific requirement and they grow in a particular growth media. Common media for growth of different microorganism, yeast and animal cells is discussed in future lecture. In today's lecture we will discuss bacterial cell division, methods of measuring growth, different phase in bacterial growth and growth kinectics.

Modes of Bacterial Cell Division-

1. Binary division- binary division is the most common mode of cell division in bacteria (Figure 9.1). In this mode of cell division, a single bacteria cell grows transversely with the synthesis of chromosomal DNA. A transverse septum appears in the middle of the cell body that divides the bacterial cell into the two with a distribution of chromosomal DNA, ribosome and other cellular machinery.