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How many of the following are reducing sugar:
Sucrose, Lactose, Maltose, Glucose, Galactose, Fructose, Glycogen, Ribose.
Correct answer is '7'. Can you explain this answer?
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How many of the following are reducing sugar:Sucrose, Lactose, Maltose...
The aldehyde group of aldoses is very susceptible to oxidation, whereas ketoses are less so, but can easily be oxidized if, like fructose, they contain an α-hydroxyl and can tautomerize to an aldose. Most monosaccharides are reducing sugars. This includes all of the common ones galactose, glucose, fructose, ribose, xylose, and mannose. Some disaccharides, such as lactose and maltose are reducing sugars since they have at least one anomeric carbon free, allowing that part of the sugar to linearize and yield an aldose.
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How many of the following are reducing sugar:Sucrose, Lactose, Maltose...
Reducing Sugars in the List
Sucrose
- Sucrose is a disaccharide composed of glucose and fructose.
- It is a non-reducing sugar since it does not have a free anomeric carbon that can form a hemiacetal bond with another compound.
Lactose
- Lactose is a disaccharide composed of glucose and galactose.
- It is a reducing sugar since it has a free anomeric carbon on the glucose molecule that can form a hemiacetal bond with another compound.
Maltose
- Maltose is a disaccharide composed of two glucose molecules.
- It is a reducing sugar since it has a free anomeric carbon on each glucose molecule that can form a hemiacetal bond with another compound.
Glucose
- Glucose is a monosaccharide and is a reducing sugar.
- It has a free anomeric carbon that can form a hemiacetal bond with another compound.
Galactose
- Galactose is a monosaccharide and is a reducing sugar.
- It has a free anomeric carbon that can form a hemiacetal bond with another compound.
Fructose
- Fructose is a monosaccharide and is a reducing sugar.
- It has a free anomeric carbon that can form a hemiacetal bond with another compound.
Glycogen
- Glycogen is a polysaccharide composed of glucose molecules.
- It is a non-reducing sugar since it does not have a free anomeric carbon that can form a hemiacetal bond with another compound.
Ribose
- Ribose is a monosaccharide and is a reducing sugar.
- It has a free anomeric carbon that can form a hemiacetal bond with another compound.
Conclusion
Out of the given list, the reducing sugars are lactose, maltose, glucose, galactose, fructose, and ribose. Sucrose and glycogen are non-reducing sugars. Therefore, the correct answer is 7.
Sucrose
- Sucrose is a disaccharide composed of glucose and fructose.
- It is a non-reducing sugar since it does not have a free anomeric carbon that can form a hemiacetal bond with another compound.
Lactose
- Lactose is a disaccharide composed of glucose and galactose.
- It is a reducing sugar since it has a free anomeric carbon on the glucose molecule that can form a hemiacetal bond with another compound.
Maltose
- Maltose is a disaccharide composed of two glucose molecules.
- It is a reducing sugar since it has a free anomeric carbon on each glucose molecule that can form a hemiacetal bond with another compound.
Glucose
- Glucose is a monosaccharide and is a reducing sugar.
- It has a free anomeric carbon that can form a hemiacetal bond with another compound.
Galactose
- Galactose is a monosaccharide and is a reducing sugar.
- It has a free anomeric carbon that can form a hemiacetal bond with another compound.
Fructose
- Fructose is a monosaccharide and is a reducing sugar.
- It has a free anomeric carbon that can form a hemiacetal bond with another compound.
Glycogen
- Glycogen is a polysaccharide composed of glucose molecules.
- It is a non-reducing sugar since it does not have a free anomeric carbon that can form a hemiacetal bond with another compound.
Ribose
- Ribose is a monosaccharide and is a reducing sugar.
- It has a free anomeric carbon that can form a hemiacetal bond with another compound.
Conclusion
Out of the given list, the reducing sugars are lactose, maltose, glucose, galactose, fructose, and ribose. Sucrose and glycogen are non-reducing sugars. Therefore, the correct answer is 7.
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How many of the following are reducing sugar:Sucrose, Lactose, Maltose...
Except sucrose in every compound free carbonyl group is present which represents the reducing sugar.where as in cyclic forms hemiacetal represents the reducing nature .In case of sucrose it lacks hemiacetal.
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How many of the following are reducing sugar:Sucrose, Lactose, Maltose, Glucose, Galactose, Fructose, Glycogen, Ribose.Correct answer is '7'. Can you explain this answer?
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