What distinguishes proteins from other macromolecule types?

Question

Multiple choice:

A) Their monomers

B) Their helical structure

C) They are polar and other macromolecules are not.

D) They are formed via dehydration synthesis.

 

Note: The correct answer is A I believe, but I'm wondering why. Thanks so much.

Answer 1

Your answer is correct.  The building blocks of a protein are the 20 amino acids.  These exist naturally in most species.  Each amino acid is different, providing the amino acid with different functions, which then can combine to make specialized proteins.  For example, a carbohydrate is a series of sugars, and the function of the sugars are not very different--the primary role of carbohydrates is to provide energy.  For proteins, however, there are many different functions.