Podcast
Questions and Answers
Maltose is the major degradative product of ______.
Maltose is the major degradative product of ______.
Starch
Sucrose (Cane sugar) is a disaccharide of α-D-glucose and α-D-fructose. It is also present in various ______.
Sucrose (Cane sugar) is a disaccharide of α-D-glucose and α-D-fructose. It is also present in various ______.
fruits
Lactose is a disaccharide of α-D galactose and α-Dglucose linked by α-(1,4) ______ linkage.
Lactose is a disaccharide of α-D galactose and α-Dglucose linked by α-(1,4) ______ linkage.
glycosidic
All monosaccharides and common disaccharides, except sucrose, are classified as ______ sugars.
All monosaccharides and common disaccharides, except sucrose, are classified as ______ sugars.
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Sucrose is a non-reducing sugar because the anomeric carbons of its component monosaccharide units are ______ to each other.
Sucrose is a non-reducing sugar because the anomeric carbons of its component monosaccharide units are ______ to each other.
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Cellulose is the most abundant structural ______ in plants.
Cellulose is the most abundant structural ______ in plants.
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Benedict's reagent is used to test for glucosuria, the presence of excess glucose in the ______.
Benedict's reagent is used to test for glucosuria, the presence of excess glucose in the ______.
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In contrast to other disaccharides, sucrose contains no free ______ carbon atom.
In contrast to other disaccharides, sucrose contains no free ______ carbon atom.
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Individuals suffering from diabetes mellitus may have glucose levels that lead to glucosuria when it rises above ______ mg/100mL in the blood.
Individuals suffering from diabetes mellitus may have glucose levels that lead to glucosuria when it rises above ______ mg/100mL in the blood.
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Humans cannot use cellulose because they lack the enzyme ______ to hydrolyze the α-(1-4) linkages.
Humans cannot use cellulose because they lack the enzyme ______ to hydrolyze the α-(1-4) linkages.
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Dextrin is a highly branched homopolymer of ______ units with α-(1, 6), α-(1, 4) and α-(1, 3) linkages.
Dextrin is a highly branched homopolymer of ______ units with α-(1, 6), α-(1, 4) and α-(1, 3) linkages.
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Glycosaminoglycans (GAGs) are negatively charged heteropolysaccharides composed of a repeating ______ unit.
Glycosaminoglycans (GAGs) are negatively charged heteropolysaccharides composed of a repeating ______ unit.
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Study Notes
Carbohydrates
- Maltose is the major degradative product of starch.
- Sucrose (Cane sugar) is a disaccharide composed of α-D-glucose and α-D-fructose.
- Sucrose is present in various plants.
Disaccharides
- Lactose is a disaccharide of α-D-galactose and α-D-glucose linked by α-(1,4) glycosidic linkage.
- All monosaccharides and common disaccharides, except sucrose, are classified as reducing sugars.
- Sucrose is a non-reducing sugar because the anomeric carbons of its component monosaccharide units are bonded to each other.
Polysaccharides
- Cellulose is the most abundant structural polysaccharide in plants.
Laboratory Tests
- Benedict's reagent is used to test for glucosuria, the presence of excess glucose in the urine.
Diabetes
- Individuals suffering from diabetes mellitus may have glucose levels that lead to glucosuria when it rises above 180 mg/100mL in the blood.
Enzymes
- Humans cannot use cellulose because they lack the enzyme cellulase to hydrolyze the α-(1-4) linkages.
Polymers
- Dextrin is a highly branched homopolymer of glucose units with α-(1, 6), α-(1, 4) and α-(1, 3) linkages.
Glycosaminoglycans
- Glycosaminoglycans (GAGs) are negatively charged heteropolysaccharides composed of a repeating disaccharide unit.
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Description
Test your knowledge on the reducing and non-reducing properties of sugars, focusing on the specific case of sucrose. Learn about the oxidation reactions of aldoses and the Benedict's reagent test. Understand why sucrose is classified as a non-reducing sugar.
