Which of the following is a component of nucleic acid and protein:
Correct answer: B. N
- A. Ca
- B. N
- C. Mg
- D. None of the above
Explanation
Nitrogen is an essential part of amino acids and therefore proteins, and it forms the nitrogenous bases of nucleic acids. Calcium and magnesium have other structural or enzymatic roles but are not basic components of both classes of molecules.
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