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giggedy giggedy Quagmire
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Why cant table sugar be the positive control in test using Benedict's solution?
Table sugar, or sucrose, doesn't have an aldehyde group. Benedict's solution is used to determine if a reducing sugar is present. If it is a reducing sugar, the mixture will turn green/orange/red. The Benedict's solution contains copper (II) ions, which are reduced to a brick red precipitate of copper (I) oxide when the solution is heated. The Aldehyde (-CHO) group in a reducing sugar is the source of electrons that reduces copper (II) to copper (I). Since sucrose doesn't have an aldehyde group, it will not test positive for reducing sugars; it will not reduce the copper II in Benedict's to copper I and change the color of the solution.Fructose does not have an aldehyde group, yet it is reducing, because it gets rearranged to the reducing glucose in basic solution.All monosaccharides and some disaccharides are reducing sugars. Sucrose is one of the disaccharides that is not a reducing sugar.
Would raffinose react with benedicts reagent?
Benedicts reagent tests for reducing sugars, so the question is, is raffinose a reducing sugar. Raffinose is a trisaccharide made up of glucose, fructose and galactose. It is not a reducing sugar because all of its anomeric carbons are bonded, so it will not react with benedicts reagent.
What is a source of error for a reducing sugar Benedict's test?
A test known as a reducing sugar Benedictâ??s test was performed to determine the amount of sugars in various fruit. Some source of errors in this test included compromises involving the various age of the fruit, the size of the fruit, and the age of the fruit, and human error. However, the test did prove that fruit can damage the enamel of oneâ??s teeth.
An unknown sample is tested with both biuret reagent and benedicts reagent both test result in a blue color what has been learned and why are these called negative results?
That the unknown sample is not a monosaccharide and is does not contain peptide bonds (is not a protein). This is because they both produced negative results because Biuret tests positive in solutions that contain peptide bonds and will turn a violet color. Benedict reagent reacts to monosaccharides and will turn green-reddish orange when a monosaccharide is present. Neither of these things happened so the results are negative.
How do you identify disaccharides?
a substance can eaither be a monosaccaride (one) disaccaride (2) or polysaccaride (more than two)
Is sucrose is reducing sugar?
No, it is not a reducing sugar.
Is maltose non reducing sugar?
maltose is a reducing sugar ..
Is beet root reducing sugar or non reducing sugar?
reducing sugar
Is Cellobiose is reducing or non reducing sugar?
It's a reducing sugar.
Is gentiobiose a reducing or non-reducing sugar?
a reducung sugar since it has an aldehyde group
What is reduced sugar?
A reducing sugar that, in a solution has an aldehyde or a ketone group. This allows the sugar has an reducing agent.
Which sugar is NOT a reducing sugar?
Sucrose
Is gentiobiose reducing or non-reducing sugar?
yes it is a reducing sugar, it has a free anomeric OH group. thus it can also mutarotate
Is splenda a sugar?
No Splenda is not a reducing sugar.
What is the action of strong alkali on reducing sugar?
The action of strong alkali on reducing sugar, reverses the form of sugar back and forth.
Is it true that orange juice and lemon juice are reducing sugar?
yes it does. lemon juice has lots of sugar in it. did u no that lemons have more sugar in than strawberrys!
Do fructose and glucose contain reducing sugars?
No, it is a polysaccharide and like other polysaccharides it is a non reducing sugar.
