Virus Summary

Everything you need to understand or teach Virus.

  • 14 Encyclopedia Articles

Study Pack

The Virus Study Pack contains:

Encyclopedia Articles (14)

1,080 words, approx. 4 pages
Viruses Viruses are infectious agents that have no organelles or reproductive machinery of their own. Viruses cannot duplicate their DNA or RNA, nor can they translate their genetic information into p... Read more
2,822 words, approx. 10 pages
Virus A virus is a parasite that must infect a living cell to reproduce. Although viruses share several features with living organisms, such as the presence of genetic material (DNA or RNA), they are ... Read more
1,539 words, approx. 6 pages
Viruses Less than a generation ago, computer viruses were considered an urban myth. They were found more often in movies than on actual computer systems. Now, however, malicious software constitutes a... Read more
1,286 words, approx. 5 pages
The Discovery of Viruses Overview By the late nineteenth century, the work of Louis Pasteur (1822-1895) and other scientists had established the germ theory of disease and identified the bacteria that... Read more
3,059 words, approx. 11 pages
Viruses and Responses to Viral Infection There are a number of different viruses that challenge the human immune system and that may produce disease in humans. In common, a virus is a small, infectiou... Read more
828 words, approx. 3 pages
Virus A virus is an infectious agent made almost entirely of protein and nucleic acids. Viruses range in size from 0.02 to 0.25 micrometer (approximately 0.000000007 in) and can only be seen using an ... Read more
849 words, approx. 3 pages
Viruses A virus in nature is a tiny organism that literally hovers at the edge of the living and the non-living. If it infects a host, it comes alive, using the host's resources to rapidly make many c... Read more
1,378 words, approx. 5 pages
Viral Genetics Viral genetics, the study of the genetic mechanisms that operate during the life cycle of viruses, utilizes biophysical, biological, and genetic analyses to study the viral genome and i... Read more
3,160 words, approx. 11 pages
Virus A virus is a small, infectious agent that consists of a core of genetic material (either deoxyribonucleic acid [DNA] or ribonucleic acid [RNA]) surrounded by a shell of protein. Viruses cause di... Read more
1,369 words, approx. 5 pages
Viral Genetics Viral genetics, the study of the genetic mechanisms that operate during the life cycle of viruses, utilizes biophysical, biological, and genetic analyses to study the viral genome and i... Read more
3,047 words, approx. 11 pages
Viruses and Responses to Viral Infection There are a number of different viruses that challenge the human immune system and that may produce disease in humans. In common, viruses are small, infectious... Read more
1,467 words, approx. 5 pages
Virus Viruses are tiny particles that consist mainly of protein and nucleic acid such as DNA or RNA. Because they contain genetic material, they are able to reproduce, but lacking cell structures and ... Read more
537 words, approx. 2 pages
Virus A virus is a submicroscopic particle that contains either RNA (ribonucleic acid)or DNA (deoxyribonucleic acid). Viruses are not capable of performing metabolic functions outside of a host cell... Read more
990 words, approx. 4 pages
Virus Replication Viral replication refers to the means by which virus particles make new copies of themselves. Viruses cannot replicate by themselves. They require the participation of the replicatio... Read more