Question

What are heterochromatin and euchromatin? What is their importance in DNA replication and transcription?

A) Heterochromatin is actively transcribed, euchromatin is inactive; Both play a role in DNA replication but not transcription
B) Heterochromatin is tightly packed, euchromatin is loosely packed; Both are involved in DNA replication and transcription
C) Heterochromatin is loosely packed, euchromatin is tightly packed; Heterochromatin is important for replication, euchromatin for transcription
D) Heterochromatin is inactive, euchromatin is actively transcribed; Heterochromatin is important for transcription, euchromatin for replication

Answer 1

Heterochromatin is tightly packaged, euchromatin is loosely packed. Heterochromatin is important for replication, euchromatin for transcription

Step-by-step explanation:

Heterochromatin is tightly packaged, while euchromatin is loosely packed. Heterochromatin usually contains genes that are not actively transcribed, while euchromatin contains genes that are transcribed. Both heterochromatin and euchromatin play important roles in DNA replication and transcription.

In DNA replication, both heterochromatin and euchromatin are involved. During replication, the DNA in both regions is unwound and copied to produce two identical copies of the DNA.

In transcription, euchromatin is more actively involved as it contains genes that are transcribed to make RNA. The less condensed structure of euchromatin allows the transcription machinery to access the DNA and initiate the transcription process.