IGNOU BBCCT 123 2026 - Differentiate between euchromatin and heterochromatin

Question

Differentiate between euchromatin and heterochromatin and explain chromatin remodeling.

09 Feb 2026

Answer :

Word Count : 249

Euchromatin and heterochromatin are two forms of chromatin found in the cell nucleus that differ in structure, function, and gene activity. Euchromatin is a loosely packed form of chromatin that is transcriptionally active, meaning it is accessible to RNA polymerase and transcription factors, allowing gene expression to occur. It appears lighter under a microscope due to its less condensed structure. In contrast, heterochromatin is densely packed, transcriptionally inactive, and appears darker under a microscope. It is generally associated with regions of the genome that are silenced, such as repetitive sequences or genes not required in a particular cell type. Heterochromatin

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