How many histone proteins are in each nucleosome?

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Multiple Choice

How many histone proteins are in each nucleosome?

Explanation:
A nucleosome is formed when DNA wraps around a histone core and is assisted by a linker histone. The core consists of eight histone proteins—two copies each of H2A, H2B, H3, and H4—around which about 146 base pairs of DNA are wound. In addition, a linker histone, H1, binds at the entry/exit points of the DNA and helps stabilize the structure and promote tighter packing of chromatin. When you include this linker histone, there are nine histone proteins associated with a single nucleosome. This is why the nine-histone count is used in many contexts.

A nucleosome is formed when DNA wraps around a histone core and is assisted by a linker histone. The core consists of eight histone proteins—two copies each of H2A, H2B, H3, and H4—around which about 146 base pairs of DNA are wound. In addition, a linker histone, H1, binds at the entry/exit points of the DNA and helps stabilize the structure and promote tighter packing of chromatin. When you include this linker histone, there are nine histone proteins associated with a single nucleosome. This is why the nine-histone count is used in many contexts.

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