Nucleoprotein is a complex formed by the combination of nucleic acids, such as DNA or RNA, with proteins. This structure plays a crucial role in the storage and expression of genetic information within cells. Nucleoproteins are essential for various cellular processes, including replication, transcription, and translation. In eukaryotic cells, nucleoproteins are primarily found in the nucleus, where they make up structures like chromatin. Chromatin consists of DNA wrapped around histone proteins, allowing for efficient packaging of genetic material. In viruses, nucleoproteins can also be found, where they help protect and manage the viral genetic material during infection.