Exam 10: Viruses

The only RNA tumor virus that causes human cancer is

What would be a reasonable number of new phages to expect from one round of viral replication in one cell?

Viruses are referred to as obligate parasites because

Plaques are

Common cold and flu are caused by which of the following pair of viruses?

Viruses have some of the properties of living organisms. Which of the following is a characteristic of all organisms,but not of viruses?

The virus that causes human severe acute respiratory syndrome (SARS)infects all of the following except

Viruses that infect bacteria are known as complex viruses. Which of the following diagrams represents a complex virus?

All of the following viruses may stay inside of a cell for many years and remain inactive except

Viroids are composed of

How are computer viruses similar to and different from biological viruses? Are computer viruses alive? Why or why not?

Prophages are responsible for production of the toxins found in

All of the following reasons explain why eggs are often used to grow animal viruses except

Enveloped animal viruses typically leave the host cell by

Recognition of the proper host cell by an animal virus may be aided by the ________ of the virus.

Some liver cancer patients are found to have had chronic liver infection. The most likely cause of this infection is by

Cells taken directly from an animal and cultured in vitro represent

Why did scientists initially resist the idea of an infectious,self-replicating protein?

Acquired Immune Deficiency Syndrome (AIDS)is caused by a retrovirus. Which of the following best represents the genetic information flow used by retroviruses?

Which of the following represents the correct order of steps in a typical virus replication cycle?