Question

Which among the following type of linkages is present in cellulose?

• A. 1 \(\rightarrow\) 6 \(\beta\) glycosidic linkages
• B. 1 \(\rightarrow\) 4 \(\beta\) glycosidic linkages
• C. 1 \(\rightarrow\) 4 \(\alpha\) glycosidic linkages
• D. 1 \(\rightarrow\) 6 \(\alpha\) glycosidic linkages

Hint:

Cellulose consists of glucose units linked by 1 \(\rightarrow\) 4 \(\beta\)-glycosidic bonds, which gives it a linear and rigid structure, unlike starch which uses \(\alpha\)-linkages.

Answer 1

The Correct Option is B

Step 1: Understanding cellulose structure.
Cellulose is a polysaccharide made of glucose monomers, linked by 1 \(\rightarrow\) 4 \(\beta\)-glycosidic bonds. This linkage gives cellulose its rigid, fibrous structure.

Step 2: Analyzing the options.
(A) 1 \(\rightarrow\) 6 \(\beta\) glycosidic linkages: This is found in some other polysaccharides, but not cellulose.
(B) 1 \(\rightarrow\) 4 \(\beta\) glycosidic linkages: This is the correct answer. Cellulose consists of \(\beta\)-glucose units linked by 1 \(\rightarrow\) 4 glycosidic bonds.
(C) 1 \(\rightarrow\) 4 \(\alpha\) glycosidic linkages: This is the type of linkage found in starch, not cellulose.
(D) 1 \(\rightarrow\) 6 \(\alpha\) glycosidic linkages: This linkage is found in some branched polysaccharides, not cellulose.

Step 3: Conclusion.
The correct answer is (B) 1 \(\rightarrow\) 4 \(\beta\) glycosidic linkages.