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प्रश्न
Differentiate between Heterochromatin & Euchromatin.
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उत्तर
| No. | Heterochromatin | Euchromatin |
| 1. | In eukaryotic cells, some segments of chromonema/ chromosome during interphase and early prophase remain in a condensed state. These regions constitute heterochromatin. | The regions of chromonema which are in a non-condensed state constitute euchromatin. |
| 2. | It is genetically and transcriptionally inactive. | It is genetically and transcriptionally very much active and fast replicating. |
| 3. | It stains strongly and appears dark. | Euchromatic regions stain light. |
संबंधित प्रश्न
Describe the structure of a nucleosome.
Attempt any TWO of the following:
With the help of a suitable example illustrate ‘Palindrome’.
A typical nucleosome "bead" is made up of ______.
The octamer of histone protein is made of ______.
Histone proteins are ______.
Read the following and answer from given below:
In prokaryotes, DNA is circular and present in the cytoplasm but in eukaryotes, DNA is linear and mainly confined to the nucleus. DNA or deoxyribonucleic acid is a long polymer of nucleotides. In 1953, the first correct double-helical structure of DNA was worked out by Watson and Crick. Based on the X-ray diffraction data produced by Maurice Wilkins and Rosalind Franklin. It is composed of three components, i.e., A phosphate group, a deoxyribose sugar, and a nitrogenous base. Different forms of DNA are B-DNA, Z-DNA, A-DNA, C-DNA, and D-DNA.
The double chain of B-DNA is coiled in a helical fashion. The spiral twisting of the B-DNA duplex produces ______
Histones are rich in ______.
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?
Define the Transfection.
Histones are enriched with ______.
