20 Questions
Which class of carbohydrates consists of more than 10 monosaccharide units?
Polysaccharides
What is the main nutritional role of carbohydrates?
To store and release energy
Which compound arises from the digestion of carbohydrates and becomes a substrate for further metabolism?
Monosaccharides
What is the fate of absorbed monosaccharides?
They are used for energy or converted to other compounds
What are the clinical signs and symptoms of lactose intolerance?
Constipation and diarrhea
Which enzyme is responsible for the initial digestion of carbohydrates in the mouth?
Ptyalin
What is the major storage carbohydrate in animals?
Glycogen
What is the action of pancreatic amylase?
Hydrolyzing α-(1,4) glycosidic linkage from molecules like starch and glycogen
Where do the lactase and cerebrosidase activities reside?
Small intestine
What is trehalose?
A disaccharide of two glucose residues in β-1,4-glycosidic linkage
Monosaccharides are the main storage form of energy in the body.
False
Polysaccharides consist of 2-10 monosaccharide units.
False
Carbohydrates serve as the structural component of cell membranes.
True
Oligosaccharides provide 4 kcal per gram.
False
Lactose intolerance is caused by the deficiency of lactase, an enzyme responsible for breaking down lactose in the intestines.
True
Starch provides 90% of dietary calories in humans worldwide.
False
Glycogen is the major storage carbohydrate in higher plants.
False
Pancreatic amylase and salivary amylase have similar optimum pH levels.
True
Trehalose is a monosaccharide composed of two glucose residues.
False
Disaccharidases are secreted through the brush border membranes of the intestinal mucosal cells.
True
Test your knowledge on the digestion and absorption of carbohydrates in the gastrointestinal system. This quiz covers the main stages of digestion, role of digestive enzymes, compounds arising from carbohydrate digestion, absorption mechanisms, fate of absorbed monosaccharides, and related topics.
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