In a Eukaryotic cell, one of the structures in the nucleus made of DNA and protein; in a prokaryotic cell, the main ring of DNA is called what?

• A. Chromatin
• B. Nucleoid
• C. Chromosome
• D. Nucleolus

Answer: (C)

This item centers on how genetic material is organized as a DNA-protein unit in both cell types. In eukaryotes, DNA is packaged with proteins to form chromosomes inside the nucleus. The material that DNA is bundled with is chromatin, but the discrete, discrete units that carry genetic information are chromosomes. In prokaryotes, there is no nucleus, but the main circular DNA molecule is still referred to as a chromosome, located in a region called the nucleoid. The term nucleolus relates to a ribosome-producing region, not the DNA ring. So the term that applies to the main ring of DNA in prokaryotes—and also describes the organized DNA-protein unit in cells more broadly—is chromosome.