Which of the following is incorrect?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Glycogen is not found in yeast and fungi
Starch, cellulose and glycogen are polysaccharides of glucose. Glycogen is the storage carbohydrate of animals (animal starch); its structure is like amylopectin but more highly branched.
Option (1) In amylose, α-D-(+)-glucose units are held by C1-C4 glycosidic linkage. — A correct statement. Amylose is a long unbranched chain of α-D-(+)-glucose units joined by C1–C4 glycosidic links.
Option (2) In Amylopectin, α-D-glucose units are held by C1-C4 and C1-C6 glycosidic linkage. — A correct statement. The main chain is C1–C4 linked and the branches are attached by C1–C6 links.
Option (3) Glycogen is not found in yeast and fungi — Not a correct statement. Glycogen is present in liver, muscles and brain, and it is also found in yeast and fungi.
Option (4) Cellulose is composed of β-D-Glucose units only — A correct statement. Cellulose is a straight chain polysaccharide of β-D-glucose units joined by C1–C4 glycosidic links.
NCERT (2026-27 edition):
Polysaccharides – …
