Topological winding number of a 2.0 kb covalently closed circular DNA was found to be 191 with a writhing number of 4. Hence, its LINKING NUMBER and the NUMBER OF BASE PAIR PER TURN when the molecule is laid flat on the surface is _______ and__________, respectively.

Topological winding number of a 2.0 kb covalently closed circular DNA

1.	Topological winding number of a 2.0 kb covalently closed circular DNA was found to be 191 with a writhing number of 4. Hence, its LINKING NUMBER and the NUMBER OF BASE PAIR PER TURN when the molecule is laid flat on the surface is _______ and__________, respectively.
A.	187, 10.69
B.	195, 10.25
C.	200, 10.00
D.	187, 10.50
Answer» B. 195, 10.25