How is Barfoed reagent able to distinguish a reducing monosaccharide from a reducing disaccharide?
How is Barfoed reagent able to distinguish a reducing monosaccharide from a reducing disaccharide?
Homework Answers
Barfoed reagent is a mixture of copper acetate and acetic acid.
The test is based on reduction of Cu2+ to Cu2O (red precipitate) by
monosaccharides. Disaccharides are much weaker reducing agents
hence they do not reduce Cu2+ under the weakly acidic test
conditions. The 
aldehyde group in the
monosaccharide gets oxidized to acid.
Add Answer to:
How is Barfoed reagent able to distinguish a reducing
monosaccharide from a reducing disaccharide?
Determine the formula of a disaccharide made from two monosaccharide units, each containing 5 carbons. Input...
Determine the formula of a disaccharide made from two monosaccharide units, each containing 5 carbons. Input your subscripts of the resulting monosaccharide with the formula CxHyoz. ха у Z=
10. Consider the disaccharide below. a. Label any acetal and hemiacetal in the disaccharide. b. Number...
10. Consider the disaccharide below. a. Label any acetal and hemiacetal in the disaccharide. b. Number each monosaccharide ring. c. Classify the glycosidic linkage as a or B and use the numbers to designate its location. d. What monosaccharides form when the disaccharide is hydrolyzed? CH2OH - CH2OH Конвенон OH 9. Consider the following cyclic monosaccharide. a. Label the hemiacetal carbon. b. Label the monosaccharide as an aor B anomer. c. Draw the other anomer. d. Assume that this is...
Determine whether each of the following carbohydrates is a monosaccharide, disaccharide, or polysaccharide.
Determine whether each of the following carbohydrates is a monosaccharide, disaccharide, or polysaccharide.
choose the monosaccharide units produced by hydrolysis for the disaccharide Problem 15.42 - Enhanced - wіth...
choose the monosaccharide units produced by hydrolysis for the
disaccharide
Problem 15.42 - Enhanced - wіth Feedback Choose the monosaccharide units produced by hydrolysis for the disaccharide: СН,ОН —0 Н ОН он н он Нон- с о . CH OH ОНН
Identify the type of glycosidic linkage in the disaccharide, and the monosaccharide units produced by hydrolysis....
Identify the type of glycosidic linkage in the disaccharide, and the monosaccharide units produced by hydrolysis.
The monosaccharide units produced by hydrolysis are
fructose and glucose
both lactose
both glucose
galactose and glucose
2. What type of bond links two monosaccharide to form a disaccharide?
2. What type of bond links two monosaccharide to form a disaccharide?
a carbohydrate can be hydrolyzed to form two moles of a monosaccharide. when the carbohydrate is...
a carbohydrate can be hydrolyzed to form two moles of a
monosaccharide. when the carbohydrate is reacted with a basic
solution of cu2+, a red precipitate forms.
A carbohydrate can be hydrolyzed to form two moles of a monosaccharide. When the carbohydrate is reacted with a basic solution of Cu2+, a red precipitate forms. Which statement is consistent with this information? The carbohydrate is a... reducing disaccharide non-reducing disaccharide. non-reducing glycoside. a sugar alcohol
Explain how many REDUCING GROUPS are in the molecule disaccharide and Draw the structure showing Reducing...
Explain how many REDUCING GROUPS are in the molecule
disaccharide and Draw the structure showing
Reducing Sugars Draw the structural formula for a-D-glucosyl-(1->6) -D-mannosamine and circle the part of this structure that makes the compound a reducing sugar.
3 & 4 If our body mainly uses the monosaccharide glucose for energy, how is it...
3 & 4
If our body mainly uses the monosaccharide glucose for energy, how is it possible that thoe polysaccharide starch, and the disaccharides lactose and sucrose can be used for energy? The enzyme a-amylase cleaves disaccharides from the non-reducing ends of amylose and amylopectin (the major components of starch). Draw the disaccharide produced by the a- amylase acting on a component of starch. (Refer to structures at the end of this lab.)
Draw a non-reducing disaccharide using D-allose and L-xylose. 7. Draw a non-reducing disaccharide using D-al...
Draw a non-reducing disaccharide using D-allose and L-xylose. 7.
Draw a non-reducing disaccharide using D-allose and L-xylose. 7.
Determine the formula of a disaccharide made from two monosaccharide units, each containing 5 carbons. Input your subscripts of the resulting monosaccharide with the formula CxHyoz. ха у Z=
10. Consider the disaccharide below. a. Label any acetal and hemiacetal in the disaccharide. b. Number each monosaccharide ring. c. Classify the glycosidic linkage as a or B and use the numbers to designate its location. d. What monosaccharides form when the disaccharide is hydrolyzed? CH2OH - CH2OH Конвенон OH 9. Consider the following cyclic monosaccharide. a. Label the hemiacetal carbon. b. Label the monosaccharide as an aor B anomer. c. Draw the other anomer. d. Assume that this is...
Determine whether each of the following carbohydrates is a monosaccharide, disaccharide, or polysaccharide.
choose the monosaccharide units produced by hydrolysis for the
disaccharide
Problem 15.42 - Enhanced - wіth Feedback Choose the monosaccharide units produced by hydrolysis for the disaccharide: СН,ОН —0 Н ОН он н он Нон- с о . CH OH ОНН
Identify the type of glycosidic linkage in the disaccharide, and the monosaccharide units produced by hydrolysis.
The monosaccharide units produced by hydrolysis are
fructose and glucose
both lactose
both glucose
galactose and glucose
2. What type of bond links two monosaccharide to form a disaccharide?
a carbohydrate can be hydrolyzed to form two moles of a
monosaccharide. when the carbohydrate is reacted with a basic
solution of cu2+, a red precipitate forms.
A carbohydrate can be hydrolyzed to form two moles of a monosaccharide. When the carbohydrate is reacted with a basic solution of Cu2+, a red precipitate forms. Which statement is consistent with this information? The carbohydrate is a... reducing disaccharide non-reducing disaccharide. non-reducing glycoside. a sugar alcohol
Explain how many REDUCING GROUPS are in the molecule
disaccharide and Draw the structure showing
Reducing Sugars Draw the structural formula for a-D-glucosyl-(1->6) -D-mannosamine and circle the part of this structure that makes the compound a reducing sugar.
3 & 4
If our body mainly uses the monosaccharide glucose for energy, how is it possible that thoe polysaccharide starch, and the disaccharides lactose and sucrose can be used for energy? The enzyme a-amylase cleaves disaccharides from the non-reducing ends of amylose and amylopectin (the major components of starch). Draw the disaccharide produced by the a- amylase acting on a component of starch. (Refer to structures at the end of this lab.)
Draw a non-reducing disaccharide using D-allose and L-xylose. 7.
Draw a non-reducing disaccharide using D-allose and L-xylose. 7.
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