Influenza Virus Function and Mechanisms

The video explains the influenza virus's lifecycle, starting with its entry into host cells, the uncoding process, and the replication of its RNA. It details how the virus uses host cell machinery to synthesize proteins and assemble new viral particles, which are then released to infect other cells. Key processes like cap snatching and the role of hemagglutinin in membrane fusion are highlighted.

What is the primary function of hemagglutinin in the influenza virus?

• To replicate the viral RNA

• To bind to host cell receptors

• To destroy host cell membranes

• To produce viral proteins

How does the influenza virus take advantage of the host cell's lysosome?

• By using its enzymes to replicate

• By using its acidity to uncoat the virus

• By hiding from the immune system

• By using its proteins to build new viruses

What is the role of the ion channel in the influenza virus?

• To allow entry of nutrients

• To facilitate the exit of viral particles

• To allow protons to enter the virus

• To block host cell defenses

What is 'cap snatching' in the context of influenza virus replication?

• The virus stealing a cap from host mRNA

• The virus creating a cap for its RNA

• The virus using host caps to block immune response

• The virus destroying host mRNA caps

Why does the influenza virus add a poly A tail to its mRNA?

• To enhance mRNA stability

• To initiate protein synthesis

• To prevent immune detection

• To degrade host mRNA

Where are the envelope proteins of the influenza virus synthesized?

• In the host cell's nucleus

• On the host cell's endoplasmic reticulum

• In the host cell's lysosome

• On the host cell's plasma membrane

What is the function of nucleocapsid proteins in the influenza virus?

• To stabilize viral RNA

• To replicate the viral genome

• To destroy host cell DNA

• To facilitate viral entry

How are new viral particles released from the host cell?

• By cell lysis

• By endocytosis

• By exocytosis

• By budding from the cell membrane

What role does the Golgi apparatus play in the influenza virus life cycle?

• It degrades viral particles

• It transports envelope proteins to the plasma membrane

• It assembles viral proteins

• It synthesizes viral RNA

How many different types of proteins are synthesized from the 8 RNA segments of the influenza virus?

• 10

• 8

• 5

• 12