You are presented with the question "what is found in proteins?" and the following answer choices: 
- Something coming from a gland
 - Something that causes allergies
 - characteristics
 - Transfers energy
 - it keeps an organism warm
 - Chemical energy
 - that material's properties
 - a colorless, odorless gas

Now knowing that nitrogen is found in proteins, nucleic acids, and chlorophyll and nitrogen, as a gas, is colorless, odorless, and a generally inert element, choose the best answer.


 

        a colorless, odorless gas 