Question

Which of the following is not a polymer of sugar? Starch - Cellulose - Glycogen - DNA

Answer 1

DNA is not a polymer of carbohydrates.

Explanation:

Starch is polymer of sugar. the sugars are connected with alpha bonds.
Cellulose is a polymer of sugar the sugars are connect with beta bonds which are more difficult to break.
Glycogen is a multibranched polymer of sugar.
Six carbon Glucose is the monomer in all the above mentioned molecules.

DNA is polymer(=nucleic acid) of nucleotides.

Along with five carbon sugar, nucleotide also possesses phosphate group and nitrogen base. This is why DNA is not considered as a polymer of carbohydrate.