Virus Practice

Which statement below best summarizes the primary difference between cells and viruses?

• All cells are prokaryotes, while viruses are eukaryotes

• All cells are eukaryotes, but viruses are not made of cells

• Cells can carry out life functions, but viruses cannot

• Viruses can carry out life functions, but bacteria cannot

A photograph of a virus is show below. The projections on the surface of this virus allow the virus to...

• move inside a host cell

• attach to a host cell

• control a host cell's DNA

• signal other viruses to infect a host cell

All living things are part of the cell theory. Why are viruses not included as part of the cell theory?

• They do not contain genetic information

• They are smaller than any living thing

• They are not capable of producing new viruses on their own

• They lack internal structures found in cells, such as nuclei

What is an important distinction between viruses and bacteria?

• One is alive while the other is not

• One contains DNA or RNA while the other does not

• One contains proteins while the other does not

• One is found naturally in the environment while the other is man-made

Individuals with HIV sometimes contract pneumonia infections that are rare in the rest of the population because people with HIV--

• are unable to fight off these pneumonia-causing organisms

• are more often exposed to these pneumonia-causing organisms

• release pheromones that attract the pneumonia-causing organisms

• release substances that increase the strength of the pneumonia-causing organisms

Viruses have structures that allow them to inject their genetic material into the DNA of a host cell. This benefits the virus in that--

• the virus is able to transform into a host cell

• mutations are introduced into the virus

• the host cell is turned into a virus

• the virus uses the host cell to replicate itself

Cold sores are caused by the herpes simplex virus type 1. A company that wants to develop antiviral drugs would ask a research immunologist to study-

• the mechanism used by the virus to infect cells

• how closely related the virus is to cold viruses

• the metabolism of the virus

• meiosis in the virus

The following is a picture of a bacteriophage. Where is the genetic information for the virus located?

• Location 1

• Location 2

• Location 3

• Location 4

How do viruses reproduce?

• They copy their own genetic material inside a protein coat

• They kill a cell and reproduce inside it

• They invade a living cell and use the cell's functions to replicate their genetic material

• They do not reproduce because they are not technically living things

What is the capsid of a virus?

• The disease it causes

• The receptors to which it binds

• Its genetic material

• Its protein coat