Multiple Choice
Cellulose, an unbranched β(1-4)-linked homopolysaccharide of D-glucose, differs from starch in that starch is:
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9. Carbohydrates
Starch
Multiple Choice
In human digestion, the pancreatic enzyme responsible for hydrolyzing starch into smaller oligosaccharides is called pancreatic _____.
A
Amylase
B
Lactase
C
Lipase
D
Trypsin
Verified step by step guidance1
Understand that starch is a polysaccharide composed of glucose units linked by glycosidic bonds, and its digestion requires enzymes that can break these bonds.
Recall that different pancreatic enzymes target different macromolecules: lipase breaks down lipids, trypsin breaks down proteins, and amylase breaks down carbohydrates like starch.
Identify that the enzyme responsible for hydrolyzing starch into smaller oligosaccharides is pancreatic amylase, which cleaves the α-1,4-glycosidic bonds in starch.
Note that lactase is an enzyme that breaks down lactose, a disaccharide found in milk, and is not involved in starch digestion.
Conclude that the correct enzyme for starch hydrolysis in human digestion is pancreatic amylase.
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