Multiple choice

Which one of the following pair of element is most essential for building cells in the human body?

  1. Nitrogen and Aluminum

  2. Carbon and Calcium

  3. Nitrogen and Carbon

  4. Calcium and Phosphorus
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carbon and nitrogen are fundamental constituent elements of organic molecules, amino acids, and proteins, which form the primary cellular building blocks of the human body. Water, proteins, lipids, and nucleic acids all rely heavily on carbon and nitrogen skeletons.

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