Which is correct statement?

Options

A. starch is a polymer of `alpha`-glucose
B. amylose is a component of cellulose
C. proteins are compound of only one type of amino acids
D. in cyclic structure of fructose, there are four carbons and one oxygen atom.

Answer

D

Explanation

Starch is a mixture of two polymers. It is not a single polymer, amylose is not a component of cellulose. It is a component of starch.
There are nearly 20 different types of amino acids present in proteins. The furanose structure of fructose has four carbon atoms and one oxygen atom in the ring