Which one of the following is NOT the role of bile?

Bile is secreted by the liver and stored in the gall bladder. It contains bile pigments (bilirubin and biliverdin), bile salts, cholesterol, and phospholipids, but no enzymes.

Bile helps in the emulsification of fats, breaking them down into very small micelles, which increases the surface area for enzyme action.

Bile also activates lipases, which are lipid-digesting enzymes.

Bile pigments are excretory products that impart the characteristic colour to faecal matter.

Trypsinogen is an inactive enzyme (zymogen) secreted by the exocrine pancreas, not by the liver or bile. Therefore, the secretion of trypsinogen is not a role of bile.

Answer: Secretion of trypsinogen enzyme.