Question

Which of the following statements is true about heterochromatin?

• A. It is the transcriptionally inactive region
• B. It is loosely packed region of DNA
• C. It stains light
• D. It can be visualised with magnifying glass

Answer 1

The correct option is A It is the transcriptionally inactive region

The DNA in the nucleus can be visualised under powerful microscopes with the help of stains. When the nucleus is stained, some parts of the chromatin are stained lightly, while others are stained dark.

The region that is densely packed, stains darkly is called heterochromatin and is transcriptionally inactive. Whereas the loosely packed region that stains light is called euchromatin. It is transcriptionally active.