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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
How are the following formed and involved in DNA packaging in a nucleus of a cell?
(ii) Nucleosome
(iii) Chromatin
Name the transcriptionally active region of chromatin in a nucleus.
Attempt any TWO of the following:
With the help of a suitable example illustrate ‘Palindrome’.
Differentiate between Heterochromatin & Euchromatin.
A typical nucleosome "bead" is made up of ______.
The additional set of proteins required for packaging of chromatin at higher level are called ______.
The length of DNA can be calculated by ______.
The net electric charge on DNA and histones is ______.
Nucleosome core is made of ______.
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?
Electron Transport System (ETS) is present in a eukaryotic cell in the:
Histones are rich in ______.
During translation initiation in prokaryotes, a GTP molecule is needed in:
______ are the amino acids of histones.
Distinguish between heterochromatin and euchromatin. Which of the two is transcriptionally active?
Part of chromatins which is densely packed stain darkly and is transcriptionally inactive is called ______.
Name the enzymes involved in replacement of gaps during RNA processing in prokaryotes and eukaryotes.
Define the Transfection.
