Go through the following statements:
(i) a typical nucleosome contains 400 bp of DNA helix.
(ii) The positively charged DNA is wrapped around the negatively charged histoned octamer to form a structure called nucleosome.
(iii) Histones are rich in the basic amino acid residues asparagine ad valine
(iv) The packaging of chromatin at higher level requires additional set of proteins that collectively are referred to as nonhistone chromosomal proteins.
Find out the wrong statements:-

Options

A. (i), (ii) & (iii)
B. (ii), (iii) & (iv)
C. (ii) & (iii)
D. (i),(iii) & (vi)

Answer

A

Explanation

A typical nucleosome contains 200 bp of DNA helix. DNA is negatively charged an histone octamer is positve charged. Asparagine is amide of aspartic acid & valine is a neutral amino acid. Histones are rich in basic amino acid lysine and arginine.