Proteins: Structure and Functions · NCERT Biology

Which of the following is the most abundant protein in the animal world?

  1. Hemoglobin
  2. Collagen
  3. RuBisCO
  4. Insulin
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Correct answer: Collagen

Collagen is the most abundant protein in the animal world, providing structural support in connective tissues. In contrast, RuBisCO is the most abundant protein in the entire biosphere.

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