17 Questions
What is the principal dietary carbohydrate of humans?
Starch & Cellulose
Which enzyme is responsible for the digestion of starch and glycogen in the mouth?
Salivary α-amylase
What are the major hydrolysis products of salivary α-amylase acting on starch and glycogen?
Maltose and iso-maltose
What happens to the action of salivary α-amylase in the stomach after about 20 minutes?
It is deactivated by stomach HCl
Which enzyme is produced by the pancreas for the digestion of carbohydrates in the small intestine?
Pancreatic α-amylase
What is the optimum pH for the action of pancreatic α-amylase?
7
Which of the following is NOT a principal dietary carbohydrate of humans?
Glucose
Which enzyme hydrolyzes α-(14)-glycosidic linkages between monosugar residues?
Pancreatic α-amylase
What is the major hydrolysis product of pancreatic α-amylase?
Free Glucose
Which enzyme is responsible for hydrolyzing α-(14)-glucosidic linkages and α-(16)-glucosidic linkages?
Isomaltase
Which enzyme is involved in the hydrolysis of dietary disaccharides such as sucrose and lactose?
Sucrase
What is the main form of transport for glucose, galactose, and fructose into absorptive epithelial cells of the small intestine?
Active transport via Na+-dependent transport
Which type of GLUT protein families is found in each cell and reflects the role of glucose metabolism in that cell?
GLUT1
What happens to most dietary galactose after absorption into the liver cells?
It is catabolized via glycolysis and pentose shunt
What is the fate of peripheral glucose after uptake and transport?
It is catabolized via glycolysis and pentose shunt
What is the main hydrolysis product of intestinal enzymes?
Glucose
What happens to fructose and glucose after transport into liver cells?
They are catabolized via glycolysis and pentose shunt.
Test your knowledge on the enzymes and transporters involved in the digestion and absorption of carbohydrates. Learn about the principal dietary carbohydrates, their digestion process, and the exception to carbohydrate digestion. Challenge yourself with this quiz!
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