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प्रश्न
Explain the classification of carbohydrates with examples.
उत्तर
Classification of carbohydrates: Carbohydrates are classified into three broad groups in accordance with their behaviour on hydrolysis as monosaccharides, oligosaccharides, and polysaccharides.
- Monosaccharides: Monosaccharides are carbohydrates which do not hydrolyse further into smaller units of polyhydroxy aldehydes or ketones.
e.g. Glucose, fructose, ribose - Oligosaccharides: Oligosaccharides are carbohydrates which on hydrolysis yield two to ten units of monosaccharides and accordingly they are further classified as disaccharides, trisaccharides, and so on.
a. Disaccharides yield two monosaccharide units on hydrolysis.
e.g. Sucrose
b. Trisaccharides yield three monosaccharide units on hydrolysis.
e.g. Raffinose
c. Tetrasaccharides yield four monosaccharide units on hydrolysis.
e.g. Stachyose - Polysaccharides: Polysaccharides give very large number of monosaccharide units on complete hydrolysis.
e.g. Starch, glycogen, cellulose
संबंधित प्रश्न
Give scientific reasons:
The disaccharide sucrose gives negative Tollens test while the disaccharide maltose gives a positive Tollens test.
Give two evidences for presence of formyl group in glucose.
What is the action of the following reagents on glucose?
hydroxylamine
What is the action of the following reagents on glucose?
hydrogen iodide
Define carbohydrates.
Which of the following type of carbohydrates cannot be hydrolyzed?
Identify the bond that links the carbon of two adjacent monosaccharides.
From the following identify an example of disaccharides.
Which of the following monosaccharides is a tetrose sugar?
Which among the following compounds is obtained when glucose reacts with hydrogen cyanide?
Which among the following type of linkages is present in cellulose?
Prolonged heating of glucose with hot HI results in the formation of ____________.
Which of the following monosaccharide is a ketohexose?
Which element among the following is not present in saccharine?
Which one of the following is an oligosaccharide?
Which following reagent is used to detect presence of five hydroxyl groups in a glucose molecule?
Which one of the following sugar does NOT have same empirical fonnula as that of carbohydrate?
Which of the following are epimers?
What are reducing and non-reducing sugars?
Classify the following into monosaccharides, oligosaccharides and polysaccharides.
Lactose
Lactose is made of ______.
Which carbon atoms of fructose are bonded together through oxygen forming fructofuranose?
Corn is immersed in boiling water. It is then cooled, and the solution becomes sweet. It is due to ______.
Why carbohydrates are generally optically active.
Describe the action of the following reagent on glucose:
dil. Nitric acid.
Write the Zwitter ion structure of alanine.
\[\ce{CH2OH - CO - (CHOH)4 - CH2OH}\] is an example of ______.
