This article throws light upon the top five techniques used to obtain pure cultures of organism. The techniques are: 1. Direct Transfer Technique 2. Single-Cell Isolation Technique 3. Streak-Plate Technique 4. Dilution Technique 5. Pour-Plate Technique. 1. Direct Transfer Technique: Sometimes bacteria, yeasts, and molds may be found in pure culture under natural condition. The transfer of such cultures can [...]
After reading this article you will learn about the reproduction of bacteria and its processes. Reproduction of Bacteria: All growing cells must divide. Most bacteria multiply by transverse, binary fission, in which a single cell divides in two after developing a transverse cell wall. Within a short period, often as short as 20 minutes, a bacterium can create a complete [...]
This article throws light upon the four main growth characteristics of a pure culture of bacteria. The growth characteristics are: 1. Colonies on Agar Media 2. Growth on Agar Slants 3. Growth in Gelatin or Agar Stabs 4. Growth in Broth. Pure Culture: Characteristic # 1. Colonies on Agar Media: The bacterial culture is mixed with gelatin or agar melted [...]