Length of DNA with 200 nucleotides is

Options

A. `680A^(@)`
B. `68A^(@)`
C. `34A^(@)`
D. `340A^(@)`

Answer

To determine the length of DNA with 200 nucleotides, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the relationship between nucleotides and DNA length**:
- It is given that 20 nucleotides correspond to a length of 34 Ångstroms (Å).

2. **Calculate the length per nucleotide**:
- To find the length of one nucleotide, we can divide the total length by the number of nucleotides:
\[ \text{Length per nucleotide} = \frac{34 \text{ Å}}{20 \text{ nucleotides}} = 1.7 \text{ Å per nucleotide} \]

3. **Calculate the total length for 200 nucleotides**:
- Now, we can find the total length for 200 nucleotides by multiplying the length per nucleotide by the total number of nucleotides:
\[ \text{Total length} = 200 \text{ nucleotides} \times 1.7 \text{ Å per nucleotide} = 340 \text{ Å} \]

4. **Conclusion**:
- Therefore, the length of DNA with 200 nucleotides is 340 Ångstroms.

### Final Answer:
The length of DNA with 200 nucleotides is **340 Ångstroms**.

---