I'm pretty sure it's high density as a solid.
The virus becoms infection, and they create an epidemic that will last for a long time. This was the case back in the early days.
The part of the enzyme molecule that binds to its associated substrate is ACTIVE SITE.
The active site contains the catalytic groups which are amino acids which promote the formation and the break down of bonds. By breaking and forming new bonds, the enzyme substrate interaction brings about the formation of the transition state.
