What is the main responsibility of proteins? *
A)Proteins are responsible for production of hormones in our body.
B)Proteins are responsible for sending signals through our bodies.
C)Proteins that our cells make determine what each cell does in the body.
D)Proteins are responsible for packaging materials in the cell to be transported out of
the cell.

Need the answers if its a multiple choice question

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