Multiple choice

Which of the following statements about histones is incorrect?

  1. Histones are highly conserved proteins.

  2. Nucleosomes have one copy of each core histone.

  3. H1 is the linker histone.

  4. Histones are rich in lysine and arginine.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Core histone of nucleosome is a histone octamer consisting of 2 copies each of H2A, H2B, H3 and H4. All the core histones are rich in lysine and arginine (amino acids with basic side chains) and their positive charges can effectively neutralise the negatively charged DNA backbone.

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