All of the following structures are proteinous in nature except:
Correct answer: D. Steroids
- A. Hooves
- B. Haemoglobin
- C. Enzymes
- D. Steroids
Explanation
One major class of lipids is the steroids, which have structures totally different from the other classes of lipids.
This question appeared on the NUMS 2014 paper, which you can sit online with every answer explained.
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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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