Fact 1: Nitrogen is found in proteins, nucleic acids, and chlorophyll.

Fact 2: Most molecules are proteins or nucleic acids.

Given the two facts above, answer the question "_ is found in most molecules." with the following options: 
- glucose
 - Gold
 - Energy
 - food
 - Polonium
 - Nitrogen
 - Helium
 - heat energy


 

      Nitrogen   