Cell diversity and viruses (Host range)

Question 1

Virus host range

Answer 1

• Viruses bind to a cell surface via specific proteins (hemagglutinin) and then enter into the cell
• Once inside the cell, the virus hijacks cellular machinery synthesizes nucleic acids (DNA/RNA/proteins)

Question 2

Narrow host range

Answer 2

Like a human cold and influenza viruses infect epithelial cells of human respiratory systems

Question 3

Wide host range cells

Answer 3

Like rabies can infect dogs, foxes, bats, raccoons and humans

Question 4

LYTIC

Answer 4

Production of virus particle ruptures and kills cells (e.g influenza rabies)

Question 5

NON LYTIC (aka integrative or lysogenic)

Answer 5

• Viral DNA is inserted into a host genome
• Infected cell can survive, often with impaired function (e.g HIV, Chicken pox)