Question

The incorrect statement in the following is:

• A. Amylopectin has $C_{1}-C_{4}$ and $C_{1}-C_{6}$ glycosidic linkages
• B. Cellulose is a straight chain polysaccharide of $\alpha-D$-glucose units through $C_{1}-C_{4}$ glycosidic linkage
• C. Glycogen is found in Yeast and fungi
• D. Glycogen is also known as animal starch

Hint:

Remember: Cellulose uses $\beta$-linkages (beta-cellulose); Starch uses $\alpha$-linkages.

Answer 1

The Correct Option is B

Step 1: Read the task.
We must find the one wrong statement about polysaccharides. So we check each option carefully.

Step 2: Check amylopectin.
Amylopectin is a branched starch and has both $C_1-C_4$ and $C_1-C_6$ glycosidic linkages. This statement is correct.

Step 3: Check the glycogen statements.
Glycogen is found in yeast and fungi and is also called animal starch. Both of these statements are correct.

Step 4: Recall cellulose structure.
Cellulose is a straight-chain polysaccharide, but it is made of beta-D-glucose units, not alpha-D-glucose units, joined by $C_1-C_4$ linkages.

Step 5: Check the cellulose statement.
The option says cellulose is made of alpha-D-glucose. Since it is really beta-D-glucose, this statement is wrong.

Step 6: Pick the incorrect one.
So the incorrect statement is the one calling cellulose a polymer of alpha-D-glucose. \[ \boxed{\text{Cellulose is beta-D-glucose, so that statement is wrong}} \]