Animals can't live without a nucleus. Prokaryotes are cells without a nucleus. DNA is typically housed in the nucleus, but in a prokaryote cell the DNA is floating around freely in the cell. Prokaryotes generally are bacteria. People and animals can't live without a nucleus, but bacteria (prokaryotes) can. So, if there is no nucleus in an animal cell then everything typically housed in the animal's nucleus is missing. DNA in the form of chromosomes is one of the things that would be missing. The DNA is probably the most important thing in the nucleus and its in the chromosomes, so your answer more than likely is DNA in chromosomes.
