A virus is made up of a DNA or RNA genome inside a protein shell called a capsid. Some viruses have an external membrane envelope. Viruses are very diverse. They come in different shapes and …

Learn about viral structure and replication, and the roles of viruses in infectious disease.

Explore the intriguing world of viruses, the tiny robot hackers of microbiology. Learn about their distinct characteristics, including their minuscule size, unique shapes, and the types of nucleic acids they …

Unit 17: Viruses About this unit This unit is part of the Biology archive. Browse videos and articles by topic. For our most up-to-date, mastery-enabled courses, check out High School Biology and AP …

Viruses are tiny, nonliving, infectious particles. A typical virus is made up of genetic material and a protein coat, called a capsid. Some viruses also have an additional outer membrane, called an …

A scientist is investigating a specimen in a laboratory. She is attempting to determine whether it is a virus or not. Which of the following would allow her to conclude that it is not a virus?

Because viruses that attack bacteria might-- sometimes the bacteria is far worse for the virus-- but these are called bacteriaphages. And I've already talked to you about how they have their DNA.

See how cells interact with one another and with other environmental factors, and how differentiation results in some cells' specialized structure and function.

Practice Virus structure and reproductive cycle questions Get 7 of 10 questions to level up!

Like other viruses, animal viruses are tiny packages of protein and nucleic acid. They have a protein shell, or capsid, and genetic material made of DNA or RNA that's tucked inside the caspid.