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Answer by Uneekstar. Confidence votes 1. In the interphase nucleus the chromatin exists in two forms; loosely coiled form called euchromatin and tightly coiled form called heterochromatin. These two types become much more coiled to form the chromosome at the time of cell division.Now come to the point.When DNA is a bit loosely colied, that is, in the euchromatin, its bases are available for transcription. On the other hand, when it is in the form of heterochromatin, the bases are not accessible for reading by RNA polymerase, hence transcription is not possible.nswer by Uneekstar. Confidence votes 1. In the interphase nucleus the chromatin exists in two forms; loosely coiled form called euchromatin and tightly coiled form called heterochromatin. These two types become much more coiled to form the chromosome at the time of cell division.
The nucleus of each cell in our bodies contains approximately 1.8 metres of DNA in total, although each strand is less than one millionth of a centimetre thick. This DNA is tightly packed into structures called chromosomes, which consist of long chains of DNA and associated proteins.In eukaryotes, DNA molecules are tightly wound around proteins-called histone proteins-which provide structural support and play a role in controlling the activities of the genes.t belongs to a class of molecules called the nucleic acids, which are polynucleotides-that is, long chains of nucleotides. Each nucleotide consists of three components: 1  a nitrogenous base: cytosine (C), guanine (G), adenine (A) or thymine (T). 2  a five-carbon sugar molecule (deoxyribose in the case of DNA).