Question

Select correct statement about Euchromatin :

• A. Highly condensed
• B. Associated with active transcription
• C. Found outside nucleus only
• D. Does not replicate during S phase

Hint:

Remember the prefixes: \textbf{Eu-} means "true" or "good". Euchromatin is "good" for transcription because it's open and accessible. \textbf{Hetero-} means "different". Heterochromatin is different, being condensed and silent (transcriptionally inactive).

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Chromatin, a complex of DNA and protein within the nucleus, exists as euchromatin and heterochromatin. These forms differ in condensation level and transcriptional activity.
Step 2: Detailed Explanation:
Evaluating statements about Euchromatin:


(A) Highly condensed: Incorrect. Euchromatin is less condensed. Heterochromatin is highly condensed.

(B) Associated with active transcription: Correct. Euchromatin's open structure enables transcription.

(C) Found outside nucleus only: Incorrect. Euchromatin is located inside the nucleus.

(D) Does not replicate during S phase: Incorrect. All DNA replicates during S phase; euchromatin replicates early.

Step 3: Final Answer:
Euchromatin is associated with active transcription.