Question

Choose the increasing sequence for the DNA packaging in a cell: (A) DNA
(B) Chromosome
(C) Chromatin
(D) Nucleosome
Choose the correct answer from the options given below:

• A. (B), (A), (C), (D)
• B. (A), (D), (C), (B)
• C. (B), (A), (D), (C)
• D. (A), (B), (D), (C)

Hint:

DNA is packaged into nucleosomes, which further condense to form chromatin, and during cell division, chromatin condenses into chromosomes.

Answer 1

The Correct Option is D

Step 1: Comprehending DNA Condensation.
Cellular DNA is meticulously organized and condensed into a hierarchical series of structures:
- DNA (A): The cell's genetic blueprint, DNA, is extensively coiled to fit within the nucleus.
- Nucleosome (D): DNA coils around histone proteins, forming nucleosomes, analogous to beads on a string.
- Chromatin (C): Nucleosomes further coil and compact to create chromatin, a DNA-protein complex that constitutes chromosomes.
- Chromosome (B): During cell division, chromatin undergoes maximal condensation to form observable chromosomes, the carriers of genetic information.
Step 2: Final Determination.
The sequential progression of DNA condensation, from the smallest to the largest structure, is DNA → Nucleosome → Chromatin → Chromosome.
Final Answer: \[\boxed{\text{The correct answer is (4) (A), (B), (D), (C).}}\]