Question

Which locations in the eukaryotic nucleus typically contain heterochromatin?

Options

• Near the nuclear envelope, at centromeres, and at telomeres

• Exclusively in the replication forks during S phase

• Only at the nucleosome core

• In the interior of the nucleus where genes are actively transcribed

Answer 1

Heterochromatin is typically located near the nuclear envelope, at centromeres, and at telomeres. These peripheral and structural regions contain densely packed, transcriptionally silent chromatin enriched in repetitive sequences. In contrast, euchromatin is located in the nuclear interior where active genes are accessible for transcription.