Microbiology

Which best explains how a virus affects other organisms?

• Viruses increase the survival of other organisms.
• Viruses immediately destroy all cells they come in contact with.
• Viruses live and reproduce in between the cells of other organisms.
• Viruses invade the cells of other organisms, using them to reproduce.

Which is true about viruses?

• Each virus has its own seasonal activity.Viruses increase the survival of other organisms.
• Each virus is transmitted through the air.
• Each virus has its own shape and structure.
• Each virus is transmitted through poor sanitation

How do viruses cause disease?

• by secreting toxins
  
• by producing excess waste
  
• by damaging or killing cells
• by competing with healthy cells for nutrients

The Anopheles mosquito transmits the parasite Plasmodium to humans. Plasmodium causes malaria. In this situation, which is the vector of the disease?

• Anopheles mosquito
• Plasmodium
• human
• malaria

Which would most likely contribute to antimicrobial resistance?

• an increased number of health care facilities
• overcrowding and poor sanitation in urban areas
• creation of new varieties of vaccinations and medicines
• providing more education and training for medical 

Which is the easiest way for a person to prevent microbial infections?

• Avoid contact with animals.
• Isolate themselves at home.
• Sterilize everything in the home.
• Wash hands frequently with hot water and soap.

Which is the most likely reason for a decline in antibiotic use?

• Antibiotics have severe health side effects.
• Companies find antibiotics too expensive to produce.
• Most health insurance does not cover treatment with antibiotics.
• Bacterial infections have become resistant to present antibiotic treatment.

Which characteristic makes bacteria suitable for scientific research of disease?

• They are multicellular.
• They reproduce rapidly.
• They keep virus populations under control.
• They grow in four stages allowing growth control.

Which best explains why more than 300 million people in Asia are infected with malaria each year?

• There is no way to protect people against the disease.
• The parasites that cause malaria lack the ability to resist antibiotics.
• The house fly contaminates food with infectious bacteria that cause malaria.
• Mosquitos are becoming resistant to insecticides and continue to carry the disease.

How does the reproductive potential of bacteria affect illnesses caused by bacteria?

• long generation time results in many bacteria
• short generation time results in many bacteria
• long generation time results in only a few bacteria
• short generation time results in only a few bacteria