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प्रश्न
Account for the following:
Glucose is a reducing sugar
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उत्तर
Glucose reduces Fehlings reagent
\[\begin{array}{cc}
\phantom{..}\ce{H}\phantom{...}\ce{O}\phantom{.........................}\ce{HO}\phantom{...}\ce{O}\phantom{...............}\\
\phantom{..}\backslash\phantom{..}//\phantom{............................}\backslash\phantom{..}//\phantom{..............}\\
\phantom{.}\ce{C}\phantom{...............................}\ce{C}\phantom{..............}\\
\phantom{..}|\phantom{................................}|\phantom{...............}\\
\phantom{.}\ce{H-C-OH}\phantom{.......................}\ce{H-C-OH}\phantom{............}\\
\phantom{......}|\phantom{................................}|\phantom{...................}\\
\phantom{.}\ce{HO-C-H + 2Cu^{2+} + 2H2O -> HO-C-H + Cu2O + 4H+}\\
\phantom{.}|\phantom{................................}|\phantom{..............}\\
\phantom{..}\ce{H-C-OH}\phantom{......................}\ce{H-C-OH}\phantom{.............}\\
\phantom{..}|\phantom{................................}|\phantom{...............}\\
\phantom{..}\ce{H-C-OH}\phantom{......................}\ce{H-C-OH}\phantom{.............}\\
\phantom{..}|\phantom{................................}|\phantom{...............}\\
\phantom{......}\ce{CH2OH}\phantom{.........................}\ce{CH2OH}\phantom{.............}
\end{array}\]
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संबंधित प्रश्न
Glucose or sucrose are soluble in water but cyclohexane or benzene (simple six membered ring compounds) are insoluble in water. Explain.
What are the expected products of hydrolysis of lactose?
Write two main functions of carbohydrates in plants.
The following molecule is called as:
\[\begin{array}{cc}
\ce{CHO}\phantom{..}\\
|\phantom{......}\\
\ce{(CHOH)4}\\
|\phantom{......}\\
\ce{CH2OH}
\end{array}\]
Glycosidic linkage is found between ____________.
Three cyclic structures of monosaccharides are given below which of these are anomers.
| (I) |  |
| (II) |  |
| (III) |  |
Which of the following monosaccharides are present as five membered cyclic structure (furanose structure)?
(i) Ribose
(ii) Glucose
(iii) Fructose
(iv) Galactose
Name the linkage connecting monosaccharide units in polysaccharides.
Which monosaccharide units are present in starch, cellulose and glucose and which linkages link these units?
The following questions are case-based questions. Read the passage carefully and answer the questions that follow:
| Carbohydrates are optically active polyhydroxy aldehydes and ketones. They are also called saccharides. All those carbohydrates which reduce Fehling's solution and Tollen's reagent are referred to as reducing sugars. Glucose, the most important source of energy for mammals, is obtained by the hydrolysis of starch. Vitamins are accessory food factors required in the diet. Proteins are the polymers of α-amino acids and perform various structural and dynamic functions in the organisms. Deficiency of vitamins leads to many diseases. |
Answer the following:
(a) The penta-acetate of glucose does not react with Hydroxylamine. What does it indicate? (1)
(b) Why cannot vitamin C be stored in our body? (1)
(c) Define the following as related to proteins: (2)
- Peptide linkage
- Denaturation
OR
(c) Define the following as related to carbohydrates: (2)
- Anomers
- Glycosidic linkage
