Colloidal protein gelatin is obtained by boiling

Options

A. Collagen
B. Elastin
C. Both (1) and (2)
D. None of these

Answer

**Step-by-Step Solution:**

1. **Understanding Gelatin**: Gelatin is a colloidal protein that is commonly used in various industries, including food, medicine, and cosmetics. It is derived from collagen, which is a structural protein found in animal tissues.

2. **Source of Gelatin**: The primary source of gelatin is collagen. Collagen is abundant in connective tissues, skin, bones, and cartilage of animals.

3. **Process of Obtaining Gelatin**: To obtain gelatin, collagen must undergo a process called hydrolysis. This process involves boiling collagen in water.

4. **Breaking Down Collagen**: When collagen is boiled, its molecular bonds break down. This hydrolysis converts the collagen into smaller peptide chains, resulting in a jelly-like substance known as gelatin.

5. **Physical Properties of Gelatin**: In its wet form, gelatin appears as a jelly-like substance. When dried, it becomes a brittle powder. Gelatin is flavorless, odorless, and colorless, making it versatile for various applications.

6. **Applications of Gelatin**: Gelatin is widely used in the food industry (e.g., in jellies, yogurts, and cakes), in medicine (e.g., as a coating for capsules), and in cosmetics.

7. **Conclusion**: Based on the information discussed, the correct answer to the question "Colloidal protein gelatin is obtained by boiling" is option A: collagen.

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