Final answer:
A nucleosome is a structure formed by DNA wrapped around histone proteins. Nucleosomes are present in both mitotic and non-mitotic chromosomes. The false statement is that nucleosomes are found only in mitotic chromosomes.
Step-by-step explanation:
A nucleosome is a structure formed by DNA wrapped around a core of eight histone proteins, with a short segment of linker DNA connecting each nucleosome. This structure gives the appearance of 'beads on a string'.
The 3-fold packing ratio of DNA mentioned in option B is true. It refers to the compaction of DNA in nucleosomes, where the DNA is wrapped around the histone proteins tightly.
Option C is false. Nucleosomes are not found only in mitotic chromosomes. They are present in both mitotic and non-mitotic chromosomes.
Therefore, the false statement about nucleosomes is option C: Nucleosomes are found only in mitotic chromosomes.