Bacteria and Viruses (2)

The coat of a virus is usually made up of_______

• a nucleic acid

• carbohydrate

• protein

The term "virus" comes from the Latin word meaning_____

• archaic

• poison

• ancient

All of the following diseases are caused by viruses except____

• strep throat

• colds

• chicken pox

Which of the following is a "nonliving" characteristic of viruses?

• They have no metabolism.

• They can mutate.

• They have DNA or RNA.

Viral infections are difficult to treat because______

• viruses do not respond to antibiotics.

• viruses have smaller ribosomes than the host cell.

• the symptoms of infection are always of short duration.

Which of the following is not true of viruses?

• They contain DNA.

• They contain protein.

• They metabolize food for energy.

In order to reproduce, a virus must be _______

• in a warm, dark place.

• have a source of food.

• be inside a living cell.

The type of reproduction that invades a host cell and remains inactive through several generations of the cell is termed_______

• endospores.

• the lysogenic cycle.

• the lytic cycle.

Viruses reproduce by ________

• undergoing mitosis.

• binary fission

• inducing a host cell to form viral particles.

• conjugation.

Viruses have some of the properties of living organisms. Which of the following is a characteristic of all organisms, except viruses?

• genetic information stored as nucleic acid.

• ability to mutate.

• ability to reproduce.

• plasma membrane.