English
Karnataka Board PUCPUC Science 2nd PUC Class 12

What are glycosidic linkages? In which type of biomolecules are they present? - Chemistry

Advertisements
Advertisements

Question

What are glycosidic linkages? In which type of biomolecules are they present?

Short/Brief Note
Advertisements

Solution

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

shaalaa.com
  Is there an error in this question or solution?
Chapter 14: Biomolecules - Multiple Choice Questions (Type - I) [Page 211]

APPEARS IN

NCERT Exemplar Chemistry [English] Class 12
Chapter 14 Biomolecules
Multiple Choice Questions (Type - I) | Q 52 | Page 211

RELATED QUESTIONS

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?


Classify the following into monosaccharides and disaccharides.

Ribose, 2-deoxyribose, maltose, galactose, fructose and lactose


What are the hydrolysis products of sucrose?


The following molecule is called as:

\[\begin{array}{cc}
\ce{CHO}\phantom{..}\\
|\phantom{......}\\
\ce{(CHOH)4}\\
|\phantom{......}\\
\ce{CH2OH}
\end{array}\]


Which of the following monosaccharide is pentose?


Glucose can’t be classified as ____________.


Which of the following reagent cannot distinguish between glucose and fructose?


Three cyclic structures of monosaccharides are given below which of these are anomers.

(I)
(II)
(III)

Structure of a disaccharide formed by glucose and fructose is given below. Identify anomeric carbon atoms in monosaccharide units.


Which of the following monosaccharides are present as five membered cyclic structure (furanose structure)?

(i) Ribose

(ii) Glucose

(iii) Fructose

(iv) Galactose


Monosaccharides contain carbonyl group hence are classified, as aldose or ketose. The number of carbon atoms present in the monosaccharide molecule are also considered for classification. In which class of monosaccharide will you place fructose?


Which monosaccharide units are present in starch, cellulose and glucose and which linkages link these units?


Assertion: Deoxyribose, \[\ce{C5H10O4}\] is not a carbohydrate.

Reason: Carbohydrates are hydrates of carbon so compounds which follow \[\ce{C_x(H2O)_y}\] formula are carbohydrates.


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)

  1. Peptide linkage
  2. Denaturation

OR

(c) Define the following as related to carbohydrates: (2)

  1. Anomers
  2. Glycosidic linkage

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×