Which of the following protein is present in milk obtained from the first transgenic cow?

Options

A. `alpha`- lactalbumin
B. `alpha` - I - antitrypsin
C. `beta` - I - antitrypsin
D. `beta`- lactalbumin

Answer

To solve the question about which protein is present in the milk obtained from the first transgenic cow, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks which specific protein is found in the milk of the first transgenic cow.

2. **Identify the Options**: The options given are:
- a) Alpha-lactalbumin
- b) Alpha-i-antitrypsin
- c) Beta-i-antitrypsin
- d) Beta-lactalbumin

3. **Recall Information about Transgenic Cows**: Transgenic cows are genetically modified to produce specific proteins in their milk. One of the notable proteins produced in the milk of the first transgenic cow is alpha-lactalbumin.

4. **Evaluate Each Option**:
- **Alpha-lactalbumin**: This is a milk protein that is indeed produced by transgenic cows.
- **Alpha-i-antitrypsin**: While this is a protein that can be produced in transgenic animals, it is not the first protein associated with transgenic cow milk.
- **Beta-i-antitrypsin**: Similar to alpha-i-antitrypsin, this is not the correct answer.
- **Beta-lactalbumin**: This is another milk protein but not specifically linked to the first transgenic cow.

5. **Select the Correct Answer**: Based on the information, the correct answer is **Alpha-lactalbumin**, as it is the protein associated with the first transgenic cow's milk.

### Final Answer:
The protein present in milk obtained from the first transgenic cow is **Alpha-lactalbumin**.

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