Transgenic animals are designed for
a) study of factors like IGF
b) testing the safety of polio vaccine
c) biological products like alpha - lactalbumin
d) xenotransplantation (transgenic pigs)
e) gene amplification

Options

A. a, b, e
B. a, b, c, d
C. b, d, e
D. b, c, d, e

Answer

To solve the question regarding the purposes for which transgenic animals are designed, we will analyze each option provided:

1. **Understanding Transgenic Animals**: Transgenic animals are genetically modified organisms (GMOs) whose DNA has been altered to express specific traits or produce certain biological products. This manipulation allows researchers to study various biological processes and develop new medical treatments.

2. **Evaluating Each Option**:
- **Option a: Study of factors like IGF**: Transgenic animals can indeed be used to study insulin-like growth factor (IGF) and its effects on growth and development. This option is correct.

- **Option b: Testing the safety of polio vaccine**: Transgenic mice have been used in research to test the safety and efficacy of vaccines, including the polio vaccine. This option is also correct.

- **Option c: Biological products like alpha-lactalbumin**: Transgenic animals, such as cows, have been engineered to produce milk containing human proteins like alpha-lactalbumin. This option is correct as well.

- **Option d: Xenotransplantation (transgenic pigs)**: Transgenic pigs are indeed used in xenotransplantation, where organs from animals are transplanted into humans. This option is correct.

- **Option e: Gene amplification**: Gene amplification is typically achieved through techniques like PCR (Polymerase Chain Reaction) and is not a purpose for which transgenic animals are designed. This option is incorrect.

3. **Conclusion**: The correct purposes for which transgenic animals are designed include options a, b, c, and d. Therefore, the answer to the question is that transgenic animals are designed for options a, b, c, and d.

**Final Answer**: The correct options are a) study of factors like IGF, b) testing the safety of polio vaccine, c) biological products like alpha-lactalbumin, and d) xenotransplantation (transgenic pigs).

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