Question

Length of one loop of B-DNA:

• A. $3.4\ nm$
• B. $0.34\ nm$
• C. $20 \ nm$
• D. $10\ nm$

Answer 1

Answer: (A)

$3.4\ nm$

Answer 2

The length of one loop of B-DNA is approximately 3.4 nanometers (nm). B-DNA is the most common and stable form of DNA, and it has a well-defined structure with specific dimensions.

So, the correct option is (A): $3.4 \ nm$