In a nucleosome, the DNA is wrapped around

a. histones.

b. ribosomes.

c. polymerase molecules.

d. a thymine dimer.

a. histones. is the correct answer.

Explanation:

In a nucleosome, the DNA is wrapped around eight histones proteins to create strong loops termed nucleosome.

A nucleosome is the structural subunit of the chromatin.

Chromatin is a fiber polymer of double-stranded DNA which is composed up of a nucleosome core. The nucleosome core is made of histone proteins

Each nucleosome is composed of DNA enclosed around eight histone proteins which are called histone octamer.