Why urea increases during urine formation?​

High levels of urea in the urine may suggest: too much protein in the diet. excessive protein breakdown in the body.

Where are they though?

When a virus infects a host cell, it uses the cell's machinery to make copies of its own genetic material in a process called replication. finally, during the process of self-assembly, that protein shell and the copies of the virus's genetic material are assembled into new viruses.