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प्रश्न
What would happen if histones were to be mutated and made rich in acidic amino acids such as aspartic acid and glutamic acid in place of basic amino acids such as lysine and arginine?
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उत्तर
If histone proteins were rich in acidic amino acids instead of basic amino acids then they may not have any role in DNA packaging in eukaryotes as DNA is also negatively charged molecule. The packaging of DNA around the nucleosome would not happen. Consequently, the chromatin fibre would not be formed.
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संबंधित प्रश्न
The number of adenine molecules in a given DNA segment is 25 and the number of cytosine molecules is 45, the total number of nucleotides in the segment is _______________.
Describe the structure of a nucleosome.
Find the odd one out:
The additional set of proteins required for packaging of chromatin at higher level are called ______.
The length of DNA can be calculated by ______.
Barr body in mammals represents ______.
Read the following and answer from given below:
The process of copying genetic information from the template strand of DNA into RNA is called transcription. It is mediated by RNA polymerase. Transcription takes place in the nucleus of eukaryotic cells. In transcription, only a segment of DNA and only one of the strands is copied into RNA.
Monocistronic structural genes are found in which organisms?
Whittaker placed prokaryotes in:
In the eukaryotic cell cycle, cell fusion experiments show that:
Watson and Crick proposed the 'Double Helix' structure of DNA based on data produced by ______
Distinguish between heterochromatin and euchromatin. Which of the two is transcriptionally active?
The non-condensed, light stained and transcriptionally active segments of chromosomes are called ______.
Who among the following has developed technique to synthesize artificial mRNA with known repeated sequences of two or three nucleotides?
What are non-histone chromosomal (NHC) proteins?
How many base pairs are contained in E. coli DNA?
What diameter is achieved after the circularisation step in prokaryotic DNA packaging?
Which protein introduces negative supercoils in prokaryotic DNA?
What is the total DNA content per nucleosome?
