>
Exams
>
Biology
>
Molecular Biology
>
the histone core in a nucleosome of chromatin thre
Question:
The histone core in a nucleosome of chromatin thread is a/an:
Show Hint
The histone core of a nucleosome is an octamer containing 2 copies each of H2A, H2B, H3, and H4.
CBSE Class XII - 2025
CBSE Class XII
Updated On:
Jan 13, 2026
Pentamer
Hexamer
Heptamer
Octamer
Show Solution
Verified By Collegedunia
The Correct Option is
D
Solution and Explanation
The nucleosome core particle consists of a histone octamer, which is made up of two copies each of the core histone proteins H2A, H2B, H3, and H4. This octamer forms the core around which DNA is wrapped.
Download Solution in PDF
Was this answer helpful?
0
0
Top CBSE CLASS XII Biology Questions
All algae have
CBSE Class XII
Biology
Algae
View Solution
With a neat, labelled diagram, describe the parts of a typical angiosperm ovule.
CBSE Class XII
Biology
sexual reproduction in flowering plants
View Solution
With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte
CBSE Class XII
Biology
sexual reproduction in flowering plants
View Solution
Draw a labeled diagram of male reproductive system.
CBSE Class XII
Biology
Human Reproduction
View Solution
Draw a labeled diagram of female reproductive system.
CBSE Class XII
Biology
Human Reproduction
View Solution
View More Questions
Top CBSE CLASS XII Molecular Biology Questions
Assertion (A): RNA is unstable and can mutate at a faster rate.
Reason (R): The presence of 2’-OH group in every nucleotide of RNA makes it labile and easily degradable.
CBSE Class XII - 2024
Biology
Molecular Biology
View Solution
In molecular biology, who proposed that genetic information flows in one direction?
CBSE Class XII - 2025
Biology
Molecular Biology
View Solution
Study the diagram given below and answer the questions that follows:
(a)
Identify the structure shown in the above figure.
(b)
Identify the labels P and Q.
(c)
Write the nature of histone proteins.
(d)
Distinguish between Euchromatin and Heterochromatin.
CBSE Class XII - 2025
Biology
Molecular Biology
View Solution
During the process of transcription, after binding to a promoter, RNA polymerase catalyses and makes the bases in the template strand of DNA available for base pairing, with the bases of:
CBSE Class XII - 2025
Biology
Molecular Biology
View Solution
What would happen if a gene encoding a polypeptide of 50 amino acids, $25^th$
Codon (UAU) is mutated to “UAA”?
CBSE Class XII - 2025
Biology
Molecular Biology
View Solution
View More Questions
Top CBSE CLASS XII Questions
2, b, c are in A.P. and the range of determinant
$\begin{vmatrix}1&1&1\\ 2&b&c\\ 4&b^{2}&c^{2}\end{vmatrix}$
is [2, 16]. Then find range of c is
CBSE Class XII
Applications of Determinants and Matrices
View Solution
A boy of mass 50 kg is standing at one end of a, boat of length 9 m and mass 400 kg. He runs to the other, end. The distance through which the centre of mass of the boat boy system moves is
CBSE Class XII
Centre of mass
View Solution
A capillary tube of radius r is dipped inside a large vessel of water. The mass of water raised above water level is M. If the radius of capillary is doubled, the mass of water inside capillary will be
CBSE Class XII
Surface Tension
View Solution
A circular disc is rotating about its own axis. An external opposing torque 0.02 Nm is applied on the disc by which it comes rest in 5 seconds. The initial angular momentum of disc is
CBSE Class XII
momentum
View Solution
A circular disc is rotating about its own axis at uniform angular velocity
\(\omega.\)
The disc is subjected to uniform angular retardation by which its angular velocity is decreased to
\(\frac {\omega}{2}\)
during 120 rotations. The number of rotations further made by it before coming to rest is
CBSE Class XII
Uniform Circular Motion
View Solution
View More Questions