Are viruses actually alive, or just tiny biological machines?
In response to the coronavirus, Steve Mould breaks down the fundamental mechanics of viruses. This video explores how these microscopic particles function, their relationship with cellular machinery, and how they move between hosts.
A virus is essentially a lifeless particle composed primarily of protein surrounding nucleic acid. While they cannot reproduce independently, they become active upon entering the cell of a plant or animal. Once inside, they hijack the host's molecular machinery to create copies known as virions.
The video covers the complexities of DNA, RNA, and the process of membrane fusion. It also examines how viruses spread from person to person and the various shapes they take, ranging from spherical to rod-like. Understanding these mechanisms is key to understanding how the immune system uses fever, white blood cells, and antibodies to defend the body, and how vaccines use dead or weakened viruses to prepare our natural defenses.
Source: Viruses Explained for Politicians (And Kids)
