Question

Histone occupies the major grooves of DNA at an angle of [CPMT 1984; CBSE PMT 2002]
A) {{15}^{o}}
B) {{90}^{o}}
C) {{45}^{o}}
to the helix axis
D) {{30}^{o}}
to the helix axis

Answer 1

Histone occupies the major grooves of DNA at an angle of
➡️
$30 {}^{2} o$

Answer 2

Answer:

The correct answer is {$30^\circ$} to the helix axis".

Explanation:

The nucleus of eukaryotes is seen to contain DNA, which is associated with histone protein which forms nucleoprotein. Histone occupies the major grooves of DNA at an angle of 300 to the axis of the helix of the DNA. The bond between the DNA and the histone is established by a Mg2+ salt linkage. While the DNA is linear in the chromosomes in of the prokaryotes, it is circular in the mitochondria and the chloroplast.