Fact 1: Protein is used to repair cells by the human body.

Fact 2: DNA makes proteins, proteins build cells, and cells make up people.

Given the two facts above, answer the question "What are needed to build cells?" with the following options: 
- hormones
 - food
 - RNA
 - isotopes
 - fats
 - clorophyll
 - DNA
 - p53


 

       DNA  