The life cycle of HIV consists of following steps. They are:- 1. Entry 2. Reverse Transcription and Integration 3. Transcription and Translation 4. Assembly, Budding and Maturation. Step # 1. Entry: Virus binds to the host cells by attaching its Gp 120 to the host cell receptor. CD4 molecule present on T lymphocytes is a predominant receptor. Entry of virus [...]
The following points highlight the life cycle of a typical plant virus such as TMV (Tobacco Mosaic Virus) which comprises of four stages. The stages are: 1. Transmission of Virus Particles (Virions) 2. Infection 3. Virus Multiplication 4. Sites of Viral RNA and Viral Protein Synthesis. Stage # 1. Transmission of Virus Particles (Virions): The rod-shaped Tobacco Mosaic Virus (TMV) [...]
In this article we will discuss about the life cycle of Ascaris suum in pigs. Eggs in faeces: It has been shown that the female of A. suum may lay as many as 2,00,000 eggs per day. The eggs are laid in the host’s (pig) intestine which are deposited outside along with faeces of host. Development in soil: A Rhabditiform [...]