Question

Some portions of DNA in eukaryotes are loosely packed whereas some regions are tightly packed and take up stain accordingly. Find the correct match to those regions in chromatin.
____P____ : Loosely packed : ____R___
____Q____ : Tightly packed : ____S___

• A. P - Heterochromatin, R - Stains dark
• B. Q - Euchromatin, S - Stains light
• C. P - Euchromatin, R - Stains light
• D. Q - Heterochromatin, S - Stains light

Answer 1

The correct option is C P - Euchromatin, R - Stains light

Some parts of DNA are loosely packed and stains lightly. Those regions of chromatin are called euchromatin. They are transcriptionally active.

Whereas some parts of the chromatin are packed densely and darkly stained. Those regions are called heterochromatin. They are transcriptionally inactive.

Euchromatin : Loosely packed : Stains light
Heterochromatin : Tightly packed : Stains dark