Understanding Viruses

This video explores the fascinating world of viruses, which are unique in that they possess some characteristics of living organisms but are not considered alive. The video explains how viruses, such as HIV, replicate by hijacking the machinery of host cells. It distinguishes viruses from bacteria, highlighting that viruses are non-living particles. The structure of viruses, including their genetic material and protein capsid, is discussed, along with the stages of viral infection: entry, replication, assembly, and release.

What is one reason viruses are not considered living organisms?

• They do not have genetic material.

• They cannot replicate on their own.

• They do not cause diseases.

• They are larger than bacteria.

How do viruses replicate?

• By hijacking a host cell's machinery.

• By dividing like bacteria.

• By using their own machinery.

• By absorbing nutrients from the environment.

Which of the following is true about bacteria compared to viruses?

• Bacteria are non-living.

• Bacteria are multicellular.

• Bacteria can replicate independently.

• Bacteria do not have genetic material.

What is the protein shell surrounding the genetic material of a virus called?

• Envelope

• Nucleus

• Capsid

• Cell wall

What is the role of the viral envelope?

• To protect the virus from the immune system.

• To help the virus attach and penetrate host cells.

• To provide energy for the virus.

• To replicate the virus's genetic material.

What is the first stage of viral infection called?

• Replication

• Entry

• Release

• Assembly

During which stage does the virus use the host cell's machinery to replicate its genetic material?

• Entry

• Assembly

• Replication

• Release

What happens during the assembly stage of viral replication?

• The virus is released from the host cell.

• The virus enters the host cell.

• The virus's genetic material is replicated.

• The virus's components come together to form new viruses.

What is the final stage of the viral replication process?

• Release

• Entry

• Replication

• Assembly

What might a virus capture from the host cell during the release stage?

• Ribosomes

• Cellular membrane material

• Capsid proteins

• Genetic material