Multiple choice

Which of the following are the most abundant elements in the living cells?

  1. C, H, S and P

  2. C, O, N and P

  3. C, H, O and N

  4. C, H, Mg and Ca
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The four most abundant elements in living cells are Carbon, Hydrogen, Oxygen, and Nitrogen (CHON), which together make up about 96% of cellular mass. Phosphorus (P), Sulfur (S), Magnesium (Mg), and Calcium (Ca) are all present but less abundant.

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