What Molecule is Composed Only of Chains and Rings of Hydrogen

Question

What molecule is composed only of chains and rings of hydrogen and carbon?
A) carbohydrate
B) hydrocarbon
C) polypeptide
D) polysaccharide

Accepted Answer

Hydrocarbons are molecules that consist only of hydrogen and carbon atoms, typically in chains or rings. carbohydrates contain oxygen atoms in addition to carbon and hydrogen, polypeptides are composed of amino acids and polysaccharides are composed of monosaccharides.