Nucleosome Count in Mammalian Cells — NEET Biology
🔥 Predicted for NEET 2027Theoretically, how many such beads (nucleosomes) do you imagine are present in a mammalian cell?
Adjacent to a frequently-asked paragraph in the same chapter.
Arrange the following events in the correct sequence of DNA helix packaging inside a eukaryotic cell: 1. Formation of chromatin fibres from beads-on-string structure 2. DNA wraps around histone octamer to form nucleosome (200 bp each) 3. Condensation of chromatin fibres into chromosomes at metaphase 4. Organisation of nucleosomes into beads-on-string structure under EM 5. Association of DNA with positively charged histones
View solution & NCERT explanation
Correct answer: A — 5 → 2 → 4 → 1 → 3
DNA (negatively charged) first associates with histones (positively charged). This wrapping around histone octamer creates nucleosomes (200 bp DNA per nucleosome). Nucleosomes appear as beads-on-string under EM. These further coil into chromatin fibres. During metaphase, chromatin fibres are highly condensed to form visible chromosomes.
What does NCERT say about Theoretically how many such?
Has this concept appeared in NEET?
Which chapter is this from?
Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.
176/180MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.