5. Why are sugars usually found as phosphorylated derivatives in cells? (A) Phosphorylated sugars are important in regulating cellular pH. (B) Unphosphorylated sugars can be transported across cell membranes. (C) Unphosphorylated sugars are rapidly degraded by cellular enzymes. (D) Phosphorylated sugars encode genetic information. (E) None of the above is a correct explanation.