14 Apr. 2014 “How Prions Arise." How Prions Arise. N.p., n.d. Web.
Every single living organism has deoxyribonucleic acid, but their cells vary. Some viruses use RNA though. The deoxyribonucleic acid, or DNA, found in organisms contain all the instructions necessary for creating different proteins that have different functions, but the molecule cannot leave the nucleus; this is where ribonucleic acid, or RNA, comes into play (Hall, 7). Deoxyribonucleic acid has multiple different components that come together in a structure that differs to the structure of ribonucleic acid (Hall, 9). Ribonucleic acid is very versatile with its build and functions.
Viruses have either DNA or RNA, but not both, a protein coat that incases the nucleic acid, and some even have a nuclear envelope. Sometimes viruses have spikes that they use to attach onto their host. Viruses undergo the lytic and lysogenic cycles when they reproduce. The lytic cycle goes through five stages: attachment, penetration, biosynthesis, maturation, and release. According to Essentials of Biology, “During attachment the capsid combines with a receptor in the bacterial cell wall.