Structural components of the nucleosome include
A) transcription factors.
B) an octamer of core histones.
C) histone H8, which has an amino-terminal tail rich in leucine and isoleucine.
D) enhancer elements.
E) None of the answers is correct.

Question

Quizplus · Accepted Answer

The nucleosome, the basic unit of DNA packaging in eukaryotes, consists of a segment of DNA wound around a core of eight histone proteins (two each of H2A, H2B, H3, and H4), forming an octamer. This structure helps in organizing the DNA into a compact form that fits within the cell nucleus. Histone H8 does not exist; instead, the core histones are H2A, H2B, H3, and H4. Transcription factors and enhancer elements are involved in the regulation of gene expression but are not structural components of the nucleosome.

Structural Components of the Nucleosome Include