Final answer:
The fat in a peanut butter sandwich would be digested by the pancreatic lipase enzyme.
Step-by-step explanation:
The fat in a peanut butter sandwich would be digested by the pancreatic lipase enzyme. Lipase, produced by the pancreas, breaks down the fats into free fatty acids and mono- and diacyl-glycerides. The fat in a peanut butter sandwich would be digested by the enzyme known as pancreatic lipase. This enzyme is secreted by the pancreas and is responsible for breaking down lipids into free fatty acids and monoglycerides in the small intestine. Since the pancreas is the primary source of lipase, the majority of lipid digestion, including the fats found in peanut butter, occurs in the small intestine with the aid of this potent digestive enzyme.