How many nucleosomes are found in helical coil of 30 nm chromatin fibre ____?
Correct answer: C. 06
- A. 10
- B. 12
- C. 06
- D. 09
Explanation
In the traditional solenoid model of the 30 nm chromatin fibre, six nucleosomes are arranged in one helical turn. Therefore the expected number is 6 nucleosomes, written as 06 in option c. Students may choose 10 or 12 by confusing the 30 nm fibre with another level of chromatin packing or with a different model.
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About Chromosomes
Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
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