Question

which element is found in both dna and protein?
○ sulfur
○ sodium
○ nitrogen
○ chlorine

Explanation:

• DNA (deoxyribonucleic acid) is composed of carbon (C), hydrogen (H), oxygen (O), nitrogen (N), and phosphorus (P).
• Proteins are made up of carbon (C), hydrogen (H), oxygen (O), nitrogen (N), and sometimes sulfur (S).
• Sulfur is only in some proteins (not all), sodium and chlorine are not common elements in DNA or proteins in a structural sense. Nitrogen is present in the nitrogen - containing bases of DNA (e.g., adenine, guanine, cytosine, thymine) and in the amino groups of amino acids (the building blocks of proteins).

Answer:

nitrogen