Which one of the following is not a lipid?
Correct answer: B. Chitin
- A. Rubber
- B. Chitin
- C. Cutin
- D. Cholesterol
Explanation
Chitin is the correct answer because it is a polysaccharide, not a lipid. It forms structural components in organisms, such as the exoskeletons of arthropods and the cell walls of fungi. On the other hand, rubber, although not a lipid, is composed of isoprene polymers, which are more related to hydrocarbons. Cutin, a protective waxy polymer in plants, and cholesterol, a critical component of cell membranes and a precursor for steroid hormones, are both classified as lipids.
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