Advertisements
Advertisements
Question
Explain the formation of a nucleosome.
Advertisements
Solution
Komberg proposed a model for the nucleosome, in which 2 molecules of the four histone proteins H2A, H2B, H3, and H4 are organized to form a unit of eight molecules called histone octamere.
The negatively charged DNA is wrapped around the positively charged histone octamere to form a structure called a nucleosome. A typical nucleosome contains 200 bp of DNA helix. The histone octameres are in close contact and DNA is coiled on the outside of the nucleosome.
Nucleosome
RELATED QUESTIONS
Short Answer Question:
Write a short note on DNA packaging in the eukaryotic cell.
Which of the following is the CORRECT statement with respect to formation of nucleosome?
A typical nucleosome "bead" is made up of ______.
The octamer of histone protein is made of ______.
Read the following and answer from given below:
In prokaryotes, DNA is circular and present in the cytoplasm but in eukaryotes, DNA is linear and mainly confined to the nucleus. DNA or deoxyribonucleic acid is a long polymer of nucleotides. In 1953, the first correct double-helical structure of DNA was worked out by Watson and Crick. Based on the X-ray diffraction data produced by Maurice Wilkins and Rosalind Franklin. It is composed of three components, i.e., A phosphate group, a deoxyribose sugar, and a nitrogenous base. Different forms of DNA are B-DNA, Z-DNA, A-DNA, C-DNA, and D-DNA.
The double helix structure of DNA was proposed by ______
Flagella are present both in prokaryotic and eukaryotic cells, however, they differ in:
Which process occurs in the regulation of gene expression in prokaryotes but does not occur in the regulation of gene expression in eukaryotes?
Total ATP production during EMP pathway is ______.
In a mature, functional mRNA of eukaryotes______.
The non-condensed, light stained and transcriptionally active segments of chromosomes are called ______.
