A Molecule That Consists Only of Carbon and Hydrogen Atoms

Question

A molecule that consists only of carbon and hydrogen atoms is called a _______________.  
A) hydrocarbon
B) nucleic acid
C) sugar
D) starch
E) carbon

Accepted Answer

A molecule that consists only of carbon and hydrogen atoms is called a hydrocarbon. Nucleic acids, sugars, and starches contain elements other than carbon and hydrogen. "Carbon" is not a molecule but an element.