BIO NMDCAT Carbohydrates
nmdcat.online June 27, 2026

During the digestion of starch by pancreatic α-amylase, the primary products are not free glucose but rather a mixture of

A. Maltose, maltotriose, and α-limit dextrins
B. Only glucose and sucrose
C. Only fructose and galactose
D. Lactose and cellulose

📝 Explanation

Pancreatic α-amylase, like salivary amylase, is an endoglycosidase that hydrolyzes internal α-1,4 bonds. It cannot cleave α-1,6 bonds at branch points. Therefore, the products are the disaccharide maltose, the trisaccharide maltotriose, and oligosaccharides containing branch points called α-limit dextrins.

📖 Additional Information

  • Maltose, maltotriose, and α-limit dextrins
  • Only glucose and sucrose
  • Only fructose and galactose
  • Lactose and cellulose

Pancreatic α-amylase, like salivary amylase, is an endoglycosidase that hydrolyzes internal α-1,4 bonds. It cannot cleave α-1,6 bonds at branch points. Therefore, the products are the disaccharide maltose, the trisaccharide maltotriose, and oligosaccharides containing branch points called α-limit dextrins.

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