Question

Nucleosome consists of a repeated unit of structure in the nucleus called
A. Chromatin
B. Chromosome
C. Histone octamer
D. Nucleotide

Answer 1

Hint: The membrane-enclosed organelle in a cell which houses the chromosomes is known as the nucleus. The nucleus carries the genes, and components that store the genetic data, and also it controls and regulates the functions of the cell such as various metabolic processes.
Complete step-by-step solution:
A nucleosome is a segment of DNA that is encircled by a protein core. DNA can be compressed into a smaller volume within the nucleus by forming a combination with proteins known as chromatin. The structure of the expanded chromatin resembles beads on a string when examined under a microscope.
The nucleosome is the fundamental repeating structural (and functional) unit of chromatin. It consists of 146 base pairs of DNA and eight histone proteins.
To create chromosomes, chromatin fibres are coiled and condensed together. Numerous cellular functions, including DNA synthesis, transcription, repair of the DNA, gene cloning, and cell division, are made possible with the help of chromatin.
Hence, option A is the correct answer.
The enormous amount of DNA in a genome is compressed by many proteins, most notably histones, into a shape that can fit inside the cell's nucleus.
Note:
DNA can be found in both chromatin and chromosomes. These two are frequently linked to histone proteins. Both also include the cell's genetic material. Chromosomes are created by further condensing the chromatin. This indicates that chromosomes are organised in a higher order of DNA than chromatin, which is the lowest order of DNA organisation.