Which of the following is the example of chemical scissors

Options

A. Eco -RI
B. Hind - III
C. Bam -I
D. All the above

Answer

**Step-by-Step Solution:**

1. **Understanding Chemical Scissors**: The term "chemical scissors" refers to enzymes that can cut DNA at specific sites. These enzymes are crucial in biotechnology for manipulating DNA.

2. **Identifying Restriction Enzymes**: The specific type of enzymes known as restriction enzymes are commonly referred to as chemical scissors. They are capable of cutting DNA at particular sequences, which is essential for various genetic engineering applications.

3. **Types of Restriction Enzymes**: There are two main types of restriction enzymes:
- **Exonucleases**: These enzymes cut DNA from the ends (periphery) of the DNA molecule.
- **Endonucleases**: These enzymes cut DNA at specific internal sites within the DNA molecule.

4. **Examples of Restriction Enzymes**: Some well-known examples of restriction enzymes that act as chemical scissors include:
- **EcoRI** (often written as ECHO R1)
- **BamHI** (correctly spelled as BAM H1)

5. **Conclusion**: Since both EcoRI and BamHI are examples of restriction enzymes, they are considered chemical scissors. Therefore, if the question provides multiple options including these enzymes, the correct answer would be "All of the above."

**Final Answer**: The examples of chemical scissors are restriction enzymes such as EcoRI and BamHI.

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