Question

which statement is correct about the reassembly of nucleosomes during replication? this step is performed by the replication licensing factor. histones from the original dna duplex are mixed with new histones on the two new dna molecules. only histones from the original dna duplex are incorporated into the two new dna molecules. only new histones are incorporated into the two new dna molecules following replication.

Explanation:

During DNA replication, nucleosomes (which consist of histone proteins and DNA) need to be reassembled on the new DNA strands. The original histones from the parental DNA duplex are disassembled ahead of the replication fork, and they are combined with newly synthesized histones. Both old and new histones are then distributed to both of the two newly formed DNA molecules. Replication licensing factors are responsible for initiating replication, not nucleosome reassembly. The other options incorrectly claim only old or only new histones are used, which is not accurate.

Answer:

Histones from the original DNA duplex are mixed with new histones on the two new DNA molecules.