Question

1. During eukaryotic supercoling DNA is first packaged into nucleosomes, which next packaged into a

   		250 nm fiber
   		700 nm fiber
   		30 nm fiber
   		sister chromatid

Answer 1

Answer=250 nm fiber

Explanation=DNA is first packaged into nucleosomes; the nucleosomes are packed to form a 30 nm fiber then this 30-nm fiber forms a series of loops and packaged in to a 250 nm fiber.

700 nm fiber is the last stage so this is incorrect option and sister chromatid is not associated with supercoiling of DNA so this is also incorrect option.