Question

The graph displays the activity curves for three human enzymes. Identify the correct enzyme with there curve.

• A. I= pepsin, II= chymotrypsin, III= fibrin
• B. I= chymotrypsin, II= fibrin, III=pepsin
• C. II=fibrin, I= pepsin, III= chymotrypsin
• D. I= pepsin, II= fibrin, III=chymotrypsin
• E. II= fibrin, III=chymotrypsin, III=pepsin

Answer 1

The correct option is D I= pepsin, II= fibrin, III=chymotrypsin

Pepsin (I), is a protein digesting enzyme secreted by chief cells of stomach wall in its inactive form called as pepsinogen which in turn is converted into active pepsin upon exposure to HCl. Fibrin (II), is a plasma protein, that serves in clotting under neutral pH of bood. Chymotrypsin (III), is one of the pancreatic enzymes that carry out protein digestion in alkaline environment of duodenum. The correct answer is option D.