Restriction' in restriction enzyme refers to

Options

A. cleaving of phosphodiester bond in DNA by the enzyme
B. cutting of DNA at specific position only
C. prevention of the multiplication of bacteriophage in bacteria.
D. All of the above.

Explanation

### Step-by-Step Solution:

1. **Understanding Restriction Enzymes**:
- Restriction enzymes, also known as molecular scissors, are proteins that cut DNA at specific sequences. They are crucial tools in biotechnology.

2. **Types of Nucleases**:
- Restriction enzymes belong to a class of enzymes called nucleases. There are two main types:
- **Exonucleases**: These enzymes cleave DNA from the ends.
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