Answer the following question given this paragraph: 

Figure 10.4 Double-stranded DNA wraps around histone proteins to form nucleosomes that have the appearance of “beads on a string. ” The nucleosomes are coiled into a 30-nm chromatin fiber. When a cell undergoes mitosis, the chromosomes condense even further.


Q: Double strands of what wrap around histone proteins to form nucleosomes, which are coiled into a chromatin fiber?


A:
dna