What is the role of ubiquitin in host cells be specific?

Ubiquitin is a protein found in eukaryotic cells that play an important role in the regulation of proteins. It labels unwanted proteins (poorly folded proteins, viral proteins) to be degraded by the proteasome in to shorter fragments. Malfunction of this protein will cause degradation of this proteins to fast or, the opposite, will not label them as unwanted.

It depends on the surface of the levels. the rougher the surface, the greater is the frictional force. for rougher surfaces, you would need to exert greater force to move the object. the concept is that, you must overcome the frictional force in order to bring the object into motion. this is the reason why we add lubricants to the joints so they could easily move. this answer was on