CELLULAR WATER. “The water occurs in two forms—free water, and bound water, Ninety five percent of the total cellular water is free water in which various inorganic substances and organic compounds are found dissolved. The remaining five percent of the total cellular water is bound water which is loosely linked with protein molecules by hydrogen bonds or other forces.”
http://www.yourarticlelibrary.com/biology/protoplasm-physical-and-chemical-nature-of-protoplasm-biology/5147