Comparing Disease-Causing Organisms

Which of the following best describes a key difference between bacteria and viruses?

• Bacteria require a host cell to reproduce, while viruses do not.

• Bacteria are living single-celled organisms, while viruses are not considered living cells.

• Viruses can be treated with antibiotics, while bacteria cannot.

• Viruses have a cell wall, while bacteria do not.

Which type of pathogen is responsible for diseases such as athlete's foot and ringworm?

• Virus

• Bacteria

• Fungi

• Parasite

How do antibiotics work in treating bacterial infections?

• They destroy the genetic material of viruses.

• They target and kill or inhibit the growth of bacteria.

• They strengthen the immune system to fight fungi.

• They prevent parasites from reproducing inside the host.

Which of the following is a characteristic shared by both fungi and bacteria?

• Both are multicellular organisms.

• Both require a host cell to reproduce.

• Both are living organisms made of cells.

• Both are treated with antiviral medications.

A student learns that vaccines are used to prevent certain diseases. Which type of pathogen can vaccines be used against?

• Fungi

• Parasites

• Viruses

• Bacteria and fungi

Which of the following best explains why antifungal medications are used instead of antibiotics to treat fungal infections?

• Antifungal medications are cheaper than antibiotics.

• Antibiotics are designed to target bacterial cell structures, which are different from fungal cell structures.

• Fungi are not living organisms, so antibiotics have no effect on them.

• Antifungal medications also work against viruses, making them more effective.

Parasites differ from viruses in how they spread disease. Which of the following correctly describes how parasites typically spread?

• Parasites spread by injecting genetic material into host cells.

• Parasites spread through direct contact with infected surfaces or contaminated food and water.

• Parasites spread only through the air.

• Parasites spread by producing toxins that travel through the bloodstream without entering cells.

Which of the following prevention methods is most effective against diseases caused by viruses?

• Taking antiparasitic medications regularly

• Applying antifungal cream to the skin

• Receiving vaccinations and practicing good hygiene

• Using antibiotics as a preventive measure

Which of the following correctly explains why viruses are difficult to treat compared to bacteria?

• Viruses are larger than bacteria, making them harder to target with medication.

• Viruses use the host's own cells to replicate, making it difficult to destroy the virus without harming the host.

• Viruses have a thick cell wall that prevents medications from entering.

• Viruses reproduce outside of cells, making them impossible to detect.

A community experiences an outbreak of a disease spread through contaminated drinking water. Using your knowledge of pathogens, which type of pathogen is most likely responsible, and what prevention strategy would be most effective?

• Virus; distribute antiviral medications to all residents

• Bacteria or parasite; purify and treat the water supply

• Fungi; apply antifungal agents to the water supply

• Virus; vaccinate all residents immediately