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प्रश्न
How are the following formed and involved in DNA packaging in a nucleus of a cell?
(ii) Nucleosome
(iii) Chromatin
उत्तर
(i) Histone octamer: It is a unit consisting of eight molecules of histone proteins (two molecules each of H2A, H2B, H3 and H4 histones). It interacts with the DNA to keep it associated with itself.
(ii) Nucleosome: DNA (negatively charged) winds around the histone octamer (positively charged) to form a nucleosome, which acts as a building block for packaging the DNA into chromatin.
(iii) Chromatin: It is a complex of DNA and proteins. Its main function is to efficiently package the DNA into the nucleus.
APPEARS IN
संबंधित प्रश्न
Attempt any TWO of the following:
With the help of a suitable example illustrate ‘Palindrome’.
Differentiate between Heterochromatin & Euchromatin.
Write a note on the packaging of DNA in Eukaryotes.
The length of DNA can be calculated by ______.
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?
Whittaker placed prokaryotes in:
What is the function of histones in DNA packaging?
Which of the following amino acid residues will constitute the histone core?
Part of chromatins which is densely packed stain darkly and is transcriptionally inactive is called ______.
