Homework (Polymers in Pharm)----2022. 5. 24 1. The basic unit (building block) of hyaluronic acid. 2. What is the electric property of hyaluronic acid, positive or negative? 3. Properties of hyaluronic acid. 4. Clinical applications of hyaluronic acid. 5. Advantages of hyaluronic acid for drug delivery. 6. What are the applications of gelatin in pharmaceutics? 7. What are the advantages and usages of human serum albumin?