Advertisements
Advertisements
प्रश्न
What are glycosidic linkages? In which type of biomolecules are they present?
Advertisements
उत्तर
The two monosaccharides are joined together by an oxide linkage formed by the loss of a water molecule. Such a linkage between two monosaccharides are held together by a glycosidic linkage between C1 of α-glucose and C2 of β-fructose. Since the reducing groups of glucose and fructose are involved in glycosidic bond formation, between two monosaccharide units through oxygen atom is called glycosidic linkage.
Sucrose
APPEARS IN
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.
What are reducing sugars?
Classify the following into monosaccharides and disaccharides.
Ribose, 2-deoxyribose, maltose, galactose, fructose and lactose
The number of primary and secondary hydroxyl groups in ribose are -
(a) 1, 3
(b) 2, 3
(c) 3, 1
(d) 3, 2
Glycosidic linkage is found between ____________.
The two functional groups present in a typical carbohydrate are:
Glucose can’t be classified as ____________.
The pair of compounds in which both the compounds give the positive test with Tollen’s reagent is:
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?
Reagent X is:
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
