Consider the following statements.
I) Transgenic animals are more sensitive to the toxic substance than non-transgenic animals.
II) Useful biological products can be produced by introducing the portion of DNA which codes for a particular product into transgenic animals
III) Brazzein is a protein produced by a west African plant, Pentadiplandra brazzeana which is approximately 2000 time as sweet as sugar.
Which of the statements are given above are correct?

Options

A. I, II and III
B. I and II
C. I and III
D. None of these

Answer

To determine which of the statements about transgenic animals and Brazzein are correct, we will analyze each statement step by step.

### Step 1: Analyze Statement I
**Statement I**: Transgenic animals are more sensitive to toxic substances than non-transgenic animals.

- **Explanation**: Transgenic animals are genetically modified to express foreign genes. This alteration can lead to increased sensitivity to certain toxic substances. The introduction of foreign genes can affect metabolic pathways, making these animals react more quickly to toxins compared to their non-transgenic counterparts. Therefore, this statement is **correct**.

### Step 2: Analyze Statement II
**Statement II**: Useful biological products can be produced by introducing the portion of DNA which codes for a particular product into transgenic animals.

- **Explanation**: This statement is true. By inserting specific genes into transgenic animals, researchers can produce valuable biological products such as hormones, antibodies, and other proteins. For example, the introduction of the gene for alpha-lactalbumin in transgenic cows increases milk production and improves its nutritional quality. Thus, this statement is also **correct**.

### Step 3: Analyze Statement III
**Statement III**: Brazzein is a protein produced by a West African plant, Pentadiplandra brazzeana, which is approximately 2000 times as sweet as sugar.

- **Explanation**: Brazzein is indeed a protein derived from the West African plant Pentadiplandra brazzeana. It is known for its intense sweetness, being approximately 2000 times sweeter than sucrose (table sugar). This statement is also **correct**.

### Conclusion
After analyzing all three statements, we conclude that:
- All three statements (I, II, and III) are **correct**.

### Final Answer
**All three statements are correct.**

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