Question

which element is found in both dna and protein? options: sulfur, sodium, nitrogen, chlorine (each with a circular selection button)

Explanation:

To determine the element in both DNA and protein:

• DNA consists of nucleotides (sugar, phosphate, nitrogen - containing base). Its elements include C, H, O, N, P.
• Proteins are made of amino acids, which have elements C, H, O, N (and sometimes S).
• Sulfur (S) is in some proteins but not DNA. Sodium (Na) and Chlorine (Cl) are not in DNA/protein core structures. Nitrogen (N) is in DNA’s nitrogenous bases and protein’s amino groups (from amino acids).

Answer:

B. nitrogen (assuming the options are ordered as: A. sulfur, B. nitrogen, C. sodium, D. chlorine)