Ocular basement membrane is stained by: (A) Alcaine blue, (B) Giemsa stain, (C) Methylene blue, (D) Periodic acid-Schiff
Answer is D. Not only ocular almost all basement membranes are stained with PAS (Periodic acid-Schiff) Because it has mucopolysaccharides Periodic acid-Schiff reactive (PAS) method is principally used to demonstrate structures rich in polysaccharides (glycogen), mucopolysaccharides (e.g., ground substance of connective tissues, basement membrane, and mucus), glycoproteins (thyroglobulin), and glycolipids.