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The distance between 2 strands of DNA is...

The distance between 2 strands of DNA is

A

3.4Å

B

34Å

C

19.8Å(20Å)

D

10Å

Text Solution

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The correct Answer is:
To determine the distance between the two strands of DNA, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding DNA Structure**: - DNA is structured as a double helix, which consists of two strands that are coiled around each other. 2. **Referencing Key Measurements**: - The diameter of the DNA double helix is a crucial measurement. According to the Watson and Crick model, the diameter of the DNA molecule is approximately 20 angstroms. 3. **Identifying the Distance Between Strands**: - The distance between the two strands of DNA refers to the width of the double helix. This is essentially the same as the diameter of the DNA molecule. 4. **Conclusion**: - Therefore, the distance between the two strands of DNA is 20 angstroms. This corresponds to option C in the provided choices. ### Final Answer: The distance between two strands of DNA is **20 angstroms** (Option C). ---
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