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Which one is the most abundant protein in the animal world?

1. Trypsin
2. Haemoglobin
3. Collagen
4. Insulin

Correct answer: Collagen

Solution

Collagen is the most abundant protein in animals because it is the primary structural component of connective tissues. It provides strength and support throughout the body, far exceeding enzymes, hormones, or transport proteins in total mass.

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