In this article we will discuss about:- 1. Introduction to Cyanophages 2. Distribution of Cyanophages 3. Nomenclature 4. Ultrastructure 5. Infection and Growth Cycle. Introduction to Cyanophages: Sufferman and Morris (1963) were the first to report the discovery of viral agent which attacks and lysis blue-green algae. Since then many more viruses have been found which attack a wide range [...]
In this article we will discuss about:- 1. Meaning of Bacteriophages 2. Ultrastructure of Bacteriophages 3. Life Cycle. Meaning of Bacteriophages (Bacterial Viruses): The viruses which attack, reproduce and lyse bacteria are called bacteriophages. The term bacteriophage literally means, "eater of bacteria". The bacteriophages do not eat bacteria but infect and kill them. Twort discovered in 1915 and Herelle studied [...]
The following points highlight the two main theories on living hypothesis of viruses. The theories are: 1. Organism Theory 2. Molecular Theory. Theory # 1. Organism Theory: The supporters of the living hypothesis argue that growth and reproduction are chief distinctive characteristics of living things (organisms). Viruses possess both. They grow, reproduce and undergo mutations and become adapted to the [...]