Viruses and Taxonomy

• The H1N1 virus is dormant in cells.
• The H1N1 virus replicates quickly.
• The H1N1 virus does not mutate.
• The H1N1 virus is transmitted through a vector host, such as a mosquito.

A person infected with the human immunodeficiency virus (HIV) may not have any symptoms for a period of time. During this period the virus affects the body by doing which of the following?

• The virus produces toxins that weaken immune cells and prevent them from reproducing.
• The virus damages immune cells while using their machinery to produce copies of itself.
• The virus uses nutrients meant for immune cells to fuel its own cellular respiration.
• The virus changes the identity of the nucleotides of immune cells to prevent the immune system from functioning normally.

Severe acute respiratory syndrome (SARS) is an illness caused by a coronavirus. Symptoms including a high fever, headaches, and body aches typically occur two to seven days after infection by the virus. SARS is more serious in elderly patients. This information suggests that the reproductive cycle of the SARS virus is - 

• lysogenic, because the virus is a coronavirus
• lytic, because the virus causes respiratory illness
• lysogenic, because the virus primarily affects older people
• lytic, because of the quick onset of symptoms after infection

• move inside a host cell
• attach to a host cell
• control a host cell's DNA
• signal other viruses to infect a host cell

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

Frogs and toads belong to the order Aura. The smallest organism in this order is about 7 millimeters long, while the largest member is about 30 centimeters long. Which of these lists best describes this order?

• Order Anura:
  338 families, 28 genera, 4360 species
• Order Anura:
  28 families, 338 genera, 4360 species
• Order Anura:
  338 families, 4360 genera, 28 species
• Order Anura: 
  28 families, 4360 genera, 338 species

• fur
• claws or nails
• lungs
• jaws

• Organisms 1 and 2
• Organisms 3 and 4
• Organisms 1 and 4
• Organisms 2 and 3

• Fraxinus americana
• Fraxinus nigra
• Acer platanoides
• Acer negundo

• Arthropoda
• Annelida
• Mollusca
• Platyhelminthes