Q. The length of DNA molecule greatly exceeds the dimensions of the nucleus in eukaryotic cells. How is this DNA accommodated?
A) super-coiling in nucleosomes
B) DNase digestion
C) through elimination of repetitive DNA
D) deletion of non-essential genes
Explanation
[Solution from source] Negatively charged DNA wraps around positively charged histone octamers to form nucleosomes, which coil further into chromatin fibres, packing about 2.2 m of DNA into a tiny nucleus. Cells do not digest DNA or delete genes or repetitive sequences to save space. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.