The plasma membrane can be most accurately compared to human skin. Skin protects our insides from many different things just as the plasma membrane does for cells.
A VIRUS consist of RNA or DNA Genes and are therfore known as RNA Virus or DNA Virus
RNA genomes is seen in majority of Viruses. Bacteriophages possess double stranded DNA genomes whereas Plant viruses possess single stranded RNA genomes
Viral genomes are linear, as we see in the adenoviruses and circular as we see in the polyomaviruses
The shape of the genome is not determined by the type of nucleic acid present in it.
The genome is often divided into separate parts, in RNA and DNA viruses, and thus we called as segmented.
Perforin is a protein that is released by Cytotoxic t cells to kill target cells. Perforin protein creates transmembranes tubules that would disintegrate target cells.This is also one of the main cytolytic protein that would induce meditated bursting of T cell and natural killer cell.
