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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.
Very Short Answer Question:
Which are the nucleosomal 'core' histones?
A typical nucleosome "bead" is made up of ______.
The chromatin is packed to form a solenoid structure of ______ diameter.
Telomere has a unique property of __________.
Barr body in mammals represents ______.
Histone proteins are ______.
The structure in chromatin seen as ‘beads-on string’ when viewed under electron microscope are called ______.
Whittaker placed prokaryotes in:
The most abundant prokaryotes helpful to human in making curd from milk and in the production of antibiotics are the ones categorised as ______ .
Part of chromatins which is densely packed stain darkly and is transcriptionally inactive is called ______.
Histones are best characterised as:
What is the approximate diameter of a eukaryotic cell nucleus?
How many base pairs are contained in E. coli DNA?
What diameter is achieved after the circularisation step in prokaryotic DNA packaging?
In prokaryotic DNA compaction, the looping step creates how many loop domains?
What is the role of topoisomerase I in prokaryotic DNA packaging?
Describe the hierarchical levels of eukaryotic DNA packaging.
