Question

Which one of the following statements is NOT correct?

• A. Glucose is stored in animals as glycogen.
• B. Glucose is stored in plants as starch.
• C. Cellulose is a polymer of only glucose.
• D. Hemicellulose is a polymer of only glucose.

Hint:

Hemicellulose is a complex polysaccharide that includes several types of sugars, unlike cellulose, which is composed of only glucose.

Answer 1

The Correct Option is D

Step 1: Evaluate Statement 1

Statement 1: Glucose is stored in animals as glycogen.
This statement is correct. In animals, glucose is stored in the form of glycogen in the liver and muscles.

Step 2: Evaluate Statement 2

Statement 2: Glucose is stored in plants as starch.
This statement is correct. Plants store glucose in the form of starch, which is made up of amylose and amylopectin.

Step 3: Evaluate Statement 3

Statement 3: Cellulose is a polymer of only glucose.
This statement is correct. Cellulose is indeed a polymer made up of glucose molecules linked by beta-1,4-glycosidic bonds, which forms the structure of plant cell walls.

Step 4: Evaluate Statement 4

Statement 4: Hemicellulose is a polymer of only glucose.
This statement is NOT correct. Hemicellulose is a heterogeneous polysaccharide that contains various sugars, including glucose, but also other sugars like xylose, arabinose, and mannose. It is not made up of glucose alone.

Therefore, the incorrect statement is statement (4).