Question

How far is each base pair from the next one in DNA double helix model ?

• A. 2 nm
• B. 3.4 nm
• C. 34 nm
• D. 0.34 nm

Answer 1

The correct option is D 0.34 nm

Answer is option D " 0.34 nm"

Base pairs are the building blocks of the DNA double helix. Base pairs consists of two nucleotide bases bound to each other by hydrogen bonds, making the DNA helix stable. The bases in DNA are 0.34nm apart as each turn of the helix is 3.4nm (or 34 Angstrom units) consisting of 10 nucleotides. Now, these nucleotides are at a distance of 0.34nm (or 3.4 Angstrom units).