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Which one of the following is the correct matching of the site of action on the given substrate, the enzyme acting upon it and the end product?
A
Small intestine - Proteins $\xrightarrow{\text{Pepsin}}$ Amino acids
B
Stomach - Fats $\xrightarrow{\text{Lipase}}$ Micelles
C
Duodenum - Triglycerides $\xrightarrow{\text{Trypsin}}$ Monoglycerides
D
Small intestine - Starch $\xrightarrow{\alpha\text{-Amylase}}$ Disaccharide (Maltose)
Detailed Solution
In the small intestine, pancreatic $\alpha$-amylase hydrolyses the polysaccharides (starch) of the chyme into disaccharides: Starch $\xrightarrow{\text{Amylase}}$ Maltose. So this matching is correct.
Pepsin acts in the stomach, not in the small intestine, and it converts proteins into proteoses and peptones, not into amino acids.
Fats are digested mainly in the small intestine by pancreatic lipase into fatty acids and monoglycerides. Micelles are formed later from these products with the help of bile salts; they are not the product of lipase action in the stomach.
Trypsin is a proteolytic enzyme that acts on proteins, peptones and proteoses; triglycerides are broken down by lipase, not by trypsin.
So the correct matching is small intestine - starch - $\alpha$-amylase - disaccharide (maltose).
Pepsin acts in the stomach, not in the small intestine, and it converts proteins into proteoses and peptones, not into amino acids.
Fats are digested mainly in the small intestine by pancreatic lipase into fatty acids and monoglycerides. Micelles are formed later from these products with the help of bile salts; they are not the product of lipase action in the stomach.
Trypsin is a proteolytic enzyme that acts on proteins, peptones and proteoses; triglycerides are broken down by lipase, not by trypsin.
So the correct matching is small intestine - starch - $\alpha$-amylase - disaccharide (maltose).