Glycogen molecules can vary greatly in size, yet all glycogen
molecules perform the same function. Proteins can also vary greatly
in size; however, proteins also vary greatly in function. Which
statement best explains this difference between glycogen and
proteins?

1,Glycogen molecules are highly branched in structure, whereas
proteins consist of long, unbranched polymer chains.

2.Glycosidic bonds link the monomers that make up glycogen,
whereas peptide bonds link the monomers that make up proteins.

3.The monomers making up glycogen can convert between ring
structures and straight-chain forms, whereas the monomers making up
proteins do not undergo these changes.

4.Glycogen molecules are composed of one type of monomer,
whereas proteins consist of twenty different monomers with
different properties.

5.The monomers making up glycogen are characterized by their
many hydroxyl (–OH) groups, whereas the monomers making up proteins
are characterized by their amino (–NH2) and carboxyl (–COOH)
groups.