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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
Name the transcriptionally active region of chromatin in a nucleus.
Find the odd one out:
Differentiate between Heterochromatin & Euchromatin.
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.
Flagella are present both in prokaryotic and eukaryotic cells, however, they differ in:
Which one of the following cell organelle is considered as ‘Cell within a cell’?
Histones are rich in ______.
Which one of the following is not considered as part of the endomembrane system?
Distinguish between heterochromatin and euchromatin. Which of the two is transcriptionally active?
What do the 'beads on strings' structure of DNA packaging represent?
The most abundant prokaryotes helpful to human in making curd from milk and in the production of antibiotics are the ones categorised as ______ .
Name the enzymes involved in replacement of gaps during RNA processing in prokaryotes and eukaryotes.
Define the Transfection.
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:
What is the nucleoid in prokaryotic cells?
What are non-histone chromosomal (NHC) proteins?
What is the approximate diameter of a eukaryotic cell nucleus?
Which protein introduces negative supercoils in prokaryotic DNA?
What is the typical range for linker DNA length between nucleosomes?
