Review (8L1.1, 8L.1.2,& 8L2.1) 1

Lyme disease is spread by ticks that attach to an animal to feed. Which describes the role of the tick?

• The tick is a virus.

• The tick is a donor.

• The tick is a vector

• The tick is a bacteria.

Which pathogen, by being the smallest, is able to spread and infect the greatest number of hosts?

• bacteria

• fungi

• protists

• viruses

Which is the most likely reason bacteria populations do not grow at exponential rates in nature?

• Conditions necessary for growth occur for a long time.

• Conditions necessary for growth occur only for a short time.

• The environment changes, and conditions are always favorable.

• The environment changes, and conditions are not always favorable.

Which is the best explanation for why there is a continued need to develop new antibiotics to fight bacterial infections?

• Bacteria learn to avoid antibiotics that have been used for years.

• Drug companies want to sell as many drugs as they can to consumers

• Bacteria are constantly mutating and developing resistance to antibiotics.

• D. Doctors need many drug options to treat many different patients with different characteristics.

Five students get sick with a cold after a weekend field trip to the aquarium with their classmates. Which best explains why these students became sick?

• contact with an infected fish

• contact with an infected person

• contact with contaminated food

• contact with a contaminated water

Devil facial tumor disease (DFTD) is a disease that is decimating the population of Tasmanian devils. The disease passes from one animal to another through bites and is caused by parasites. The parasites cause cancerous tumors that spread throughout an infected animal's body and kill it. What is the BEST description of DFTD?

• a non-infectious, cell-cycle disease

• an infectious, cell-cycle disease

• a non-infectious, chronic disease

• an infectious, chronic disease

Human Immunodeficiency Virus (HIV) infects the cells that coordinate the human immune response. When these cells are killed or compromised, the body cannot effectively protect itself from infection. Which cells does HIV infect?

• natural killer T cells

• B. regulatory T cells

• cytotoxic T cells

• helper T cells

Dr. Wagner is investigating a newly discovered, disease-causing agent. She determines that one structure in the agent is double-stranded RNA. What kind of agent is Dr. Wagner studying?

• a virus

• a protist

• a fungus

• a bacterium

Which set of diseases do viruses cause?

• malaria, influenza, AIDS

• herpes, smallpox, bubonic plague

• influenza, AIDS, smallpox

• bubonic plague, malaria, herpes

Which a molecular process found only in retroviruses?

• reverse translation

• translation

• reverse transcription

• transcription