Understanding Viral Pathways

The video tutorial explains the lytic and lysogenic pathways of viruses. It begins with an overview of virus structure, highlighting the protein coat and genetic material. The lytic pathway is described as a process where the virus injects its genetic material into a host cell, leading to replication, assembly of new viruses, and cell lysis. The lysogenic pathway involves the integration of viral genetic material into the host's DNA, allowing it to replicate with the host cell over many years. Eventually, the viral material can re-enter the lytic cycle. The video concludes with questions to test understanding.

What is the primary function of the protein coat in a virus?

• To attack host cells

• To produce energy

• To protect the genetic material

• To replicate the virus

During the lytic pathway, what happens after the virus injects its genetic material into the host cell?

• The viral genetic material is replicated

• The host cell repairs itself

• The virus becomes dormant

• The host cell dies immediately

What is the result of cell lysis in the lytic pathway?

• The host cell becomes stronger

• The host cell repairs itself

• New viruses are released

• The virus is destroyed

What is the role of viral proteins in the lytic pathway?

• To integrate with host DNA

• To repair the host cell

• To form the protein coat of new viruses

• To destroy the host cell

How does the lytic cycle continue after cell lysis?

• New viruses infect other cells

• The virus becomes dormant

• The host cell becomes immune

• The host cell repairs itself

In the lysogenic pathway, what happens to the viral genetic material?

• It exits the host cell

• It is destroyed by the host cell

• It immediately forms new viruses

• It combines with the host DNA

How does the lysogenic pathway differ from the lytic pathway initially?

• The host cell is destroyed immediately

• The viral genetic material integrates with the host DNA

• The virus does not inject its genetic material

• The virus remains outside the host cell

What happens to the viral genetic material during the lysogenic pathway over time?

• It replicates with the host DNA

• It is destroyed by the host cell

• It forms new viruses immediately

• It exits the host cell

What triggers the transition from the lysogenic to the lytic pathway?

• The host cell repairs itself

• The host cell dies

• The viral genetic material leaves the host DNA

• The virus finds a new host

What is the outcome when the viral genetic material becomes active again in the lysogenic pathway?

• The host cell becomes immune

• New viruses are formed

• The virus is destroyed

• The host cell repairs itself