Which one is the most abundant protein in the animal world

Options

A. haemoglobin
B. Collagen
C. Insulin
D. Trypsin

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the most abundant protein in the animal world. This requires knowledge of various proteins and their prevalence in animals.

2. **Identifying Common Proteins**: Some common proteins found in animals include collagen, hemoglobin, and enzymes like rubisco. We need to determine which of these is the most abundant.

3. **Researching Collagen**: Collagen is a structural protein that is found in connective tissues, skin, bones, and cartilage. It is known for providing strength and integrity to these structures.

4. **Quantifying Collagen**: It is estimated that collagen accounts for about 30% of the total protein content in the human body and is similarly abundant in many other animals.

5. **Comparing with Other Proteins**: While rubisco is an important protein in plants for carbon fixation, it is not found in animals. Hemoglobin is also significant but does not match the abundance of collagen across the animal kingdom.

6. **Conclusion**: Based on the information gathered, collagen is identified as the most abundant protein in the animal world.

**Final Answer**: Collagen is the most abundant protein in the animal world.

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