Chlorophyll is a/an _____ molecule?
Correct answer: D. Organic
- A. Inorganic
- B. Cationic
- C. Anionic
- D. Organic
Explanation
Chlorophyll is an organic molecule because it is a carbon-based pigment with a complex ring structure and a magnesium ion at its centre. The likely mistake is choosing inorganic because chlorophyll contains magnesium, but the presence of one metal ion does not make the entire carbon-based molecule inorganic.
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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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