Question

Abrin and ricin are secondary metabolites of some plants. These secondary metabolites are

• A. Lipid in nature
• B. Proteins in nature
• C. Carbohydrate in nature
• D. Glycolipid in nature

Answer 1

Answer: (B)

Proteins in nature

A plant cell produces two types of metabolites: primary metabolites and secondary metabolites.primary metabolites are involved directly in growth and metabolism (carbohydrates, lipids, and proteins), Secondary metabolites are the end products of primary metabolism and not involved in the metabolic activity(alkaloids, phenolics, sterols, steroids, essential oils). Abrin and ricin belong to toxin category of secondary metabolites. Abrin and ricin are ribosome inhibiting proteinaceous toxins found in seeds of castor oil plants.proteins in nature.

So, the correct answer is ' Proteins in nature'.