Dna is packaged in the nucleus of the cell in a structure called in which the dna coils around proteins called histones many times over. when cell replication occurs, the dna condenses even more into a
a) chromatin, chromosome
b) chromosome, chromatin
c) nucleosome, chromosome
d) chromosome, nucleosome

DNA is packaged in the nucleus of the cell in a structure called in which the DNA coils around proteins called histones many times over. When cell replication occurs, the DNA condenses even more into a .

A)chromatin, chromosome

B)chromosome, chromatin  

C)nucleosome, chromosome  

D)chromosome, nucleosome

The answer is a, i did it on USATestprep

i think the answer would d

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.