A nucleosome is composed of
Correct answer: A. DNA and histone protein.
- A. DNA and histone protein.
- B. RNA and histone protein.
- C. nitrogenous base and sugar.
- D. nitrogenous base, sugar and phosphate.
Explanation
A nucleosome is the fundamental unit of DNA packaging in eukaryotic cells, consisting of a segment of DNA wound around a core of histone proteins. Option A is correct because it accurately describes this structure. Option B is incorrect because RNA is not involved in forming nucleosomes. Options C and D describe components of nucleotides, not the structure of nucleosomes.
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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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