NEET Previous Year Question
With respect to nucleosome, which of the following statements is incorrect?
Topic: NEET PYQ
Answer: D. Full step-by-step solution below.
- ANucleosomes are seen as ‘beads on string’ under Electron Microscope
- BDNA is wrapped around positively charged histone octamer to form nucleosome.
- CNucleosome is the repeating unit of chromatin
- DNucleosome contains 120 bp of DNA helix
Correct answer: D
Solution
(d) Nucleosome contains about 146 bp of DNA wrapped around a histone octamer.(a) Correct → Nucleosomes appear as beads on string.
(b) Correct → DNA wraps around positively charged histone octamer.
(c) Correct → Nucleosome is the repeating unit of chromatin.
(d) Incorrect → Nucleosome does not contain 120 bp DNA.
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