Genetic engineering is

Options

A. Study of extra nuclear gene
B. Manipulation of gene by artificial method
C. Manipulation of RNA
D. Manipulation of enzymes

Answer

**Step-by-Step Solution:**

1. **Understanding Genetic Engineering**: Genetic engineering refers to the direct manipulation of an organism's genes using biotechnology. This involves altering the genetic material to achieve desired traits or characteristics.

2. **Identifying the Purpose**: The primary aim of genetic engineering is to improve the traits of organisms. This can include enhancing growth rates, disease resistance, or other beneficial characteristics.

3. **Mechanism of Action**: In genetic engineering, specific genes are artificially introduced into an organism. These genes carry the desired traits that the scientist wants to express in the organism.

4. **Importance of DNA**: Genes are segments of DNA, which is the hereditary material in organisms. DNA has the unique ability to be passed down from one generation to the next, ensuring that the introduced traits can be inherited by future generations.

5. **Evaluating the Options**:
- Option A: Study of extra nuclear gene - This is not correct as genetic engineering focuses on manipulating genes, not merely studying them.
- Option B: Manipulation of gene by artificial method - This is the correct answer, as it accurately describes the process of genetic engineering.
- Option C: Manipulation of RNA - This is incorrect because RNA manipulation does not lead to inherited traits.
- Option D: Manipulation of enzymes - This is also incorrect for the same reason as RNA; it does not involve inheritance.

6. **Conclusion**: The correct answer to the question "Genetic engineering is" is **Option B: Manipulation of gene by artificial method**.

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