Multiple choice

Which of the following statements regarding nucleosomes is incorrect?

  1. They are beaded structures, each with a histone core wrapped in a left-handed super helix of DNA.

  2. The beads are linked by a DNA chain.

  3. Each contains two molecules of histones H2A, H2B, H3 and H4.

  4. The primary structure of the histones is a characteristic of the cell type and the species.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Histone proteins (H2A, H2B, H3, H4) are highly conserved across species and cell types. Their primary amino acid sequence is remarkably similar from yeast to humans, not characteristic of specific cell types.

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