The second most abundant bio element in the human body is:
Correct answer: B. Carbon
- A. Oxygen
- B. Carbon
- C. Hydrogen
- D. Nitrogen
Explanation
Carbon is the second most abundant element in the human body, accounting for 18% of body weight. Oxygen is the most abundant, constituting about 61- 65% of the mass of the human body.
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About Classification of Biological Molecules
Biological molecules are classified as carbohydrates, lipids, proteins and nucleic acids, with water, minerals and vitamins also supporting cellular processes. The key distinctions involve their monomers, chemical bonds, structures and functions, including glucose and starch, fatty acids and triglycerides, amino acids and polypeptides, and nucleotides in DNA and RNA.
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