Out of 92 naturally occurring chemical elements how many are considered as bio-elements?
Correct answer: B. 16
- A. 6
- B. 16
- C. 26
- D. 15
Explanation
Although many elements occur naturally, only about 16 are regarded as bio-elements because they are essential components of living matter and support cellular structure or metabolism. Students may choose 6, confusing the major elements with the complete list of essential bio-elements.
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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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