Question

The approximate uniform distance between two strands of B-DNA is

• A. 34 Angstrom
• B. 18 Angstrom
• C. 36 Angstrom
• D. 20 Angstrom

Answer 1

The correct option is D

20 Angstrom

The correct option is D:

Explanation for the correct option:

1. The standard right-handed DNA helix, which is the most prevalent form of DNA, is referred to as B-DNA.
2. Canonical B-DNA is a double helix composed of two antiparallel strands joined by hydrogen bonds between the purine and pyrimidine base pairs.
3. The width or uniform distance between the two strands of B-DNA is approximately 20 Angstrom.

Final Answer: The approximate uniform distance between two strands of B-DNA is 20 Angstrom.