Immunity & Vaccines

Question 1

Which of the following statements about vaccinations is correct?

Accepted Answer

Vaccinations can help prevent some infectious diseases in animals.

Answer

Vaccinations can cure an animal that is already sick with an infectious disease.

Answer

Vaccinations can prevent all infectious diseases in plants.

Answer

Vaccinations are only needed for humans, not for animals.

Question 2

Which statement about vaccinations for animals is correct?

Accepted Answer

Vaccines help protect animals from some infectious diseases.

Answer

Vaccines can cure diseases that animals already have.

Answer

Vaccines make animals immune to all kinds of diseases.

Answer

Vaccines are only given to plants to stop diseases.

Question 3

After Eli recovers from a stomach infection caused by bacterium X, a lab test shows that his bloodstream now contains a large amount of IgG antibodies that match a protein on the surface of bacterium X. Which of the following best describes the series of events that led to the creation of those antibodies?

Accepted Answer

A B cell that had a receptor matching the bacterial protein bound the pathogen, internalized it, displayed fragments on its surface with MHC II, received activating signals from a helper T cell, and then differentiated into a plasma cell that secreted the matching antibodies.

Answer

The B cell that recognized the bacterial protein immediately turned into a plasma cell and released the antibodies, without needing any other cell type.

Answer

A helper T cell that recognized the bacterial protein released cytokines that caused a nearby B cell to produce antibodies that fit any bacterial surface.

Answer

A macrophage that ate the bacteria changed into a B cell, which then secreted antibodies that directly destroyed the bacteria.

Try three questions

Which of the following statements about vaccinations is correct?

Which statement about vaccinations for animals is correct?

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