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प्रश्न
What is the function of histones in DNA packaging?
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उत्तर
Histone are the basis protein that are rich in arginine and lysine. Histones form octamer on which DNA is wrapped and form nucleosome that means it helps in packaging of DNA in eukaryotes.
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संबंधित प्रश्न
Differentiate between Euchromatin and Heterochromatin.
Describe the structure of a nucleosome.
Explain the role of histones in forming a nucleosome.
Attempt any TWO of the following:
With the help of a suitable example illustrate ‘Palindrome’.
Draw a neat and labelled diagram of the Nucleosome.
Write a note on the packaging of DNA in Eukaryotes.
Explain the formation of a nucleosome.
The additional set of proteins required for packaging of chromatin at higher level are called ______.
The length of DNA can be calculated by ______.
The octamer of histone protein is made of ______.
Telomere has a unique property 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.
Name the linkage present between the nitrogen base and pentose sugar in DNA.
Electron Transport System (ETS) is present in a eukaryotic cell in the:
Which one of the following is not considered as part of the endomembrane system?
Which one of the following statements about Histones is wrong?
In an experiment, DNA is treated with a compound which tends to place itself amongst the stacks of nitrogenous base pairs. As a result of which, the distance between two consecutive base increases, from 0.34nm to 0.44 nm. Calculate the length of DNA double helix (which has 2 × 109 bp) in the presence of saturating amount of this compound.
What do the 'beads on strings' structure of DNA packaging represent?
Replication of DNA in eukaryotes is initiated by ______.
Part of chromatins which is densely packed stain darkly and is transcriptionally inactive is called ______.
Statement I: In prokaryotes, the positively charged DNA is held with some negatively charged proteins in a region called nucleoid.
Statement II: In eukaryotes, the negatively charged DNA is wrapped around the positively charged histone octamer to form nucleosome.
In the light of the above statements, choose the correct answer from the options given below:
