The Question is from neet-botany biomolecules-biology , and it was created by the author D VINOD

Question

Inulin, a storage polysaccharide found in some plants, is composed of fructose monomers linked primarily by which type of bond?

D VINOD · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
 **Primary Concept**: Glycosidic bonds in polysaccharides
 **Related Topics**: Carbohydrate structure, Inulin properties, Fructose structure
 **Prerequisites**: Understanding of monosaccharides, glycosidic bond formation, and polysaccharide structures.
## SOLUTION PATHWAY
**Given Information**:
  Inulin is a storage polysaccharide composed of fructose monomers.
  We need to identify the primary type of glycosidic bond linking these fructose units.
**Method & Steps**:
 1. Understanding Glycosidic Bonds: Glycosidic bonds are covalent bonds that link monosaccharides together to form disaccharides and polysaccharides.  The type of bond is determined by the carbon atoms involved and the orientation (α or β) of the glycosidic linkage.
  Reasoning: Inulin is a fructan, a type of polysaccharide where fructose units are linked together.  The specific type of linkage is key to its properties.
  Formula/Rule:  Glycosidic bonds are represented as  α-1,4 or β-2,1, etc., where the first number indicates the carbon atom of the first monosaccharide, the number after the comma indicates the carbon atom of the second monosaccharide, and α or β indicates the anomeric configuration.
 2. Identifying the Inulin Linkage: Inulin is primarily composed of fructose units linked by β-2,1-glycosidic bonds.  This means the bond forms between the carbon 2 of one fructose molecule and the carbon 1 of another fructose molecule, with a β configuration at the anomeric carbon (carbon 1).
  Working: The β configuration refers to the orientation of the hydroxyl group on the anomeric carbon of the fructose molecule.  This specific linkage contributes to the solubility and other properties of inulin.
  Key Point:  While some minor branching may occur through other linkages (like β-1,2), the predominant linkage in inulin is β-2,1.
 3. Final Answer: The primary type of glycosidic bond in inulin is β-2,1-glycosidic bonds.
  Result: Option B is correct.
  Verification:  Consulting reliable sources on carbohydrate chemistry confirms that inulin's primary linkage is indeed β(2→1).
 ## OPTION ANALYSIS
A :x: α-1,4-glycosidic bonds are found in starch (amylose and amylopectin).
B ✓: β-2,1-glycosidic bonds are the primary linkages in inulin.
C :x: α-1,6-glycosidic bonds are found in the branching points of amylopectin (a component of starch).
D :x: β-1,4-glycosidic bonds are found in cellulose.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing α and β configurations:  Paying attention to the orientation of the hydroxyl group on the anomeric carbon is crucial.
  2.Misinterpreting the numbers in the glycosidic bond notation:  Understanding which carbon atoms are involved in the bond is essential.
 **Quick Tips**:
  1.Remember the key polysaccharide linkages: starch (α-1,4 and α-1,6), cellulose (β-1,4), and inulin (β-2,1).
  2.Use diagrams to visualize the glycosidic bond formation between monosaccharides.

D VINOD · Answer

α-1,4-glycosidic bonds

D VINOD · Answer

The correct Option is "β-2,1-glycosidic bonds"

D VINOD · Answer

α-1,6-glycosidic bonds

D VINOD · Answer

β-1,4-glycosidic bonds

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