Question

with the help suitable diagram describe the structure of a nucleosome
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Answer 1

Answer:

           Nucleosome is a small dark staining body present in the nucleus of an eukaryotic cell which is located in the chromatin network and appears as beads on string of chromatin fibres under an electron microscope.

• Each nucleosome is formed of DNA which is negatively charged and histone octamer which is positively charged .
• Eight molecules of histone get organized to form histone octamer.
• Under the electron microscope, nucleus shows chromatin network. The nuleosomes in chromatin are seen as 'beads-on-string'.
• Adjacent nucleosomes are linked with small segments of DNA called linker DNA; of about 54 bp.
• Thus the string is DNA which is 2 nm or 20A in diameter.
• This beads-on-string structure gets condensed into nucleosome fiber which is 10 nm. (100Å) in diameter.
• Each nucleosome contains 200 bp of DNA helix. Nucleosome and solenoid fibers are characteristic of nucleus at interphase.

The BadSoorat here ✌

Answer 2

Answer:

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             hope it helps u