I’m going for real I haven’t done this because it was hard didn’t get it but now I know // ANSWER -
True. A protein becomes functional only when it reaches its tertiary shape (3D). It is not necessary for the protein to reach the quaternary stage, but that is just a more complex functioning protein. It really is just two tertiary merged together. Example is red blood cells.
I think it is called the anemone
Yes, short answer, I can not give you the specifics (consult your biology textbook)