Question

Width of the DNA molecule is

• A. 15 $A^{\circ }$
• B. 20 $A^{\circ }$
• C. 25 $A^{\circ }$
• D. 34 $A^{\circ }$

Answer 1

The correct option is B 20 $A^{\circ }$

A single human DNA molecule, stretched out a straight line, has a width of about 20 Angstrom and a length of approximately 34 Angstrom per turn. Hence, option B is correct.