Who has got the Nobel Prize for the discovery of type II restriction enzymes ?
A). W.Aeber B). A.Tiselius
(C) H.Smith (D) . Nathans .

Options

A. A,B
B. B,C
C. C,D
D. A,C,D

Answer

To solve the question of who received the Nobel Prize for the discovery of type II restriction enzymes, we can follow these steps:

1. **Understand the Question**: The question is asking for the recipient of the Nobel Prize specifically for the discovery of type II restriction enzymes.

2. **Identify the Key Terms**: The key terms in the question are "Nobel Prize" and "type II restriction enzymes".

3. **Recall Relevant Information**: Type II restriction enzymes are a class of enzymes that cut DNA at specific sequences. They are crucial in molecular biology for cloning and genetic engineering.

4. **Review the Options**: The options given are:
- A) W. Auer
- B) A. Tiselius
- C) H. Smith
- D) Nathans

5. **Evaluate Each Option**:
- **W. Auer**: Not known for type II restriction enzymes.
- **A. Tiselius**: Known for work in electrophoresis, not restriction enzymes.
- **H. Smith**: Yes, he is one of the discoverers of type II restriction enzymes.
- **Nathans**: Yes, he is also recognized for his work related to type II restriction enzymes.

6. **Conclude**: Since both H. Smith and Nathans were awarded the Nobel Prize for their contributions to the discovery of type II restriction enzymes, the correct answer to the question is option (C) H. Smith and option (D) Nathans. However, since the question asks for who specifically has got the Nobel Prize, we can conclude that the best answer is option (D) Nathans, as he is often highlighted in this context.

Final Answer: **(D) Nathans**