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प्रश्न
The linkage present in Lactose is ______.
विकल्प
α, β - 1, 2 - glycosidic linkage
α - 1, 4 - glycosidic linkage
β - 1, 4 - glycosidic linkage
α - 1, 4 - glycosidic linkage
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उत्तर
The linkage present in Lactose is β - 1, 4 - glycosidic linkage.
Explanation:
Lactose is a disaccharide composed of glucose and galactose.
These two monosaccharides are joined by a β-1,4-glycosidic bond, where the hydroxyl group on carbon 1 of galactose (in the β-configuration) is linked to the hydroxyl group on carbon 4 of glucose.
This type of linkage is hydrolysed by the enzyme lactase in the human body during digestion.
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संबंधित प्रश्न
Give scientific reasons:
The disaccharide sucrose gives negative Tollens test while the disaccharide maltose gives a positive Tollens test.
Draw a neat diagram for the following:
Haworth formula of glucopyranose.
Draw a neat diagram for the following:
Haworth formula of maltose
Write the name of the unit to which glucose unit is linked to from sucrose.
Explain the preparation of glucose from sucrose.
Draw the Haworth projection structure of the following.
α-D-(–)-Fructofuranose
Write a commercial method for preparation of glucose.
What is monosaccharide?
By which of the following process formation of glycosidic bond occurs?
Identify the bond that links the carbon of two adjacent monosaccharides.
Which of the following monosaccharides is a tetrose sugar?
Carbohydrates can contain which of the following chemical groups?
From the following which is a heteropolysaccharide?
Identify a non-reducing carbohydrate from the following.
____________ do not give smaller sugar units on hydrolysis.
Match the columns and select the correct option.
| Column I | Column II | ||
| i. | Starch | a. | Animal storage molecule |
| ii. | Cellulose | b. | Plant storage molecule |
| iii. | Glycogen | c. | Heparin |
| iv. | Heteropolysaccharide | d. | Plant cell wall component |
Which reagent among the following is used to confirm presence of aldehydic carbonyl group in glucose?
Prolonged heating of glucose with hot HI results in the formation of ____________.
One mole of a carbohydrate on hydrolysis gives one mole of glucose and one mole of galactose. Identify the carbohydrate.
\[\ce{CH3 - CH2 - CH2 - Br ->[Na][dry ether] A ->[Cl2] B}\]
Identify the product B in the above reaction.
Which one of the following is a carbohydrate but does NOT follow the general formula of carbohydrate?
Which one of the following is generally applicable to polysaccharides?
Which one of the following is Tetrose sugar?
Which one of the following carbohydrates is insoluble in water?
Which one of the following is NOT soluble in water?
Which among the following statements is true for amylose?
Which one of the following sugar does NOT have same empirical fonnula as that of carbohydrate?
Identify the number of secondary carbon atoms in glucose.
When 2 moles of stachyose is hydrolyzed, the number of moles of galactose obtained is ____________.
Which among the following reagents is used to obtain gluconic acid from glucose?
How many moles of acetic acid are obtained in the reaction when one mole glucose is treated with excess acetic anhydride?
Which among the following is a product of hydrolysis of one mole raffinose?
When one mole of lactose is hydrolysed, the hydrolysate contains ____________.
How many optical isomers are possible for a compound having four asymmetric carbon atoms?
Complete hydrolysis of cellulose gives ____________.
Classify the following into monosaccharides, oligosaccharides and polysaccharides.
Starch
Classify the following into monosaccharides, oligosaccharides and polysaccharides.
Lactose
Write the structure of α-D (+) glucopyranose.
Which carbon atoms of fructose are bonded together through oxygen forming fructofuranose?
Identify the monosaccharide containing only one asymmetric carbon atom in its molecule.
Starch and cellulose are compounds made up of many units of ______.
Formation of gluconic acid from glucose by oxidation using Br2 water.
Consider the following reaction
\[\ce{A <-[Br2 - H2O] Glucose ->[HNO3] B}\]
Here, 'A' and 'B' are respectively.
Identify the product obtained in the following conversion.
\[\ce{Glucose ->[(O)][Br2 water] Product}\]
Why carbohydrates are generally optically active.
CH2 OH - CO - (CHOH)4 - CH2 OH is an example of ______.
Why carbohydrates are generally optically active.
\[\ce{CH2OH - CO - (CHOH)4 - CH2OH}\] is an example of ______.
\[\ce{CH2OH - CO - (CHOH)4 - CH2OH}\] is an example of ______.
Why carbohydrates are generally optically active.
The sugar found in milk is ______.
