Question Detail
Question
takes lighter DNA stain and is genetically active: A. Euchromatin B. Heterochromatin C. Constitutive heterochromatin D. Facultative heterochromatin
Correct Answer
Option A is the correct answer.
Detailed Explanation
Euchromatin is a less condensed form of DNA that stains lightly. Because it is loosely packed, the genes in euchromatin are accessible to transcription machinery and are therefore genetically active. Heterochromatin is highly condensed, stains darkly, and is generally inactive.
Hint
Think 'true chromatin' – this open, light-staining form is where the action happens.