Arrange the given structures involved in packaging of DNA Helix.
(A) Chromatin
(B) Chromatin fibers
(C) Nucleosome
(D) Euchromatin
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → (C), (A), (B), (D)
To understand the packaging of DNA, let’s look at the hierarchical order of structures:
(C) Nucleosome
- Basic unit of DNA packaging.
- DNA wrapped around histone proteins.
(A) Chromatin
- Nucleosomes coil together to form chromatin, a less compact form.
(B) Chromatin fibers
- Further coiling of chromatin into thicker fibers (30 nm fiber), forming more condensed structures.
(D) Euchromatin
- A form of chromatin that is lightly packed and transcriptionally active. It represents a functional stage of chromatin structure.
Correct Sequence: Nucleosome → Chromatin → Chromatin fibers → Euchromatin