27.4-5 HW (Viruses)

What is the primary reason new influenza vaccines are needed each year?

• Changes in environmental factors

• Accumulation of changes in the H and N molecules of the virus

• Improvement in vaccine technology

• Decrease in human immunity levels

Tags

NGSS.HS-LS4-4

Which of the following is NOT a disease caused by viruses?

• Smallpox

• Leukemia

• Hepatitis

• Influenza

What major event in 1918 is associated with the influenza virus?

• Discovery of the virus

• A worldwide pandemic killing 50 to 100 million people

• Development of the first vaccine

• Identification of the H1N1 strain

What is the significance of antigenic shift in influenza viruses?

• It refers to a decrease in the virus's ability to infect humans.

• It indicates a minor change in the virus that does not affect vaccine effectiveness.

• It involves major changes that can lead to new virus strains.

• It is a process that reduces the virus's ability to spread between species.

Tags

NGSS.HS-LS4-5

According to the text, what complicates the development of effective vaccines against influenza?

• The stable nature of the virus

• The virus's ability to infect only humans

• The constant change in the virus's H-molecule regions

• The lack of technological advancements in vaccine development

Which of the following would not be a component of the SARS coronavirus genome?

• Spike proteins genes

• Envelope glycoproteins genes

• Flagella genes

• Nucleocapsid protein genes

What strategy would be effective in containing an outbreak of SARS? (Choose all that apply.)

• Developing a vaccine

• Isolating infected individuals

• Increasing public awareness

• Implementing travel bans

Tags

NGSS.HS-ETS1-1

What is the primary reason that viruses may contribute to about 15% of all human cancer cases?

• They cause immune system suppression.

• They trigger the expression of cancer-causing genes.

• They directly kill cells.

• They infect cells with bacterial agents.

What is the key molecular violation noted in the hypothesis that prions replicate without nucleic acids?

• Only proteins can transmit genetic information.

• Only DNA or RNA can be hereditary material.

• Prions can replicate without any genetic material.

• Prions use lipids to replicate.

What is a characteristic feature of diseases caused by prions?

• They cause the brain to increase in size.

• They result in the formation of numerous small cavities in the brain.

• They lead to the development of tumors.

• They are typically caused by viruses.