Viral Life Cycles Lytic Versus Lysogenic Explained

This video tutorial explains the differences between the lytic and lysogenic viral life cycles. The lytic cycle involves the lysis of the host cell, releasing new viral particles, and is known as a virulent infection. In contrast, the lysogenic cycle integrates viral DNA into the host genome, allowing the virus to exist in a dormant state without killing the host cell. The video also compares the two cycles, highlighting key differences such as DNA integration, host cell lysis, and replication mechanisms.

What is the primary outcome of the lytic viral life cycle?

• Transformation of the host cell into a virus

• Lysis of the host cell and release of viral particles

• Dormant state of the virus within the host

• Integration of viral DNA into the host genome

How does the virus replicate during the lytic cycle?

• By forming a prophase

• By remaining dormant in the host cell

• By using the host's cellular machinery

• By integrating into the host's DNA

In the lysogenic cycle, what happens to the viral DNA?

• It forms new viral particles immediately

• It is destroyed by the host cell

• It causes immediate lysis of the host cell

• It integrates into the host genome

What is the role of phase encoded integrases in the lysogenic cycle?

• To integrate viral DNA into the host genome

• To replicate viral particles

• To lyse the host cell

• To hydrolyze host DNA

What is a key characteristic of the lysogenic cycle?

• Immediate destruction of the host cell

• Integration of viral DNA into the host genome

• Rapid production of viral progeny

• Independent replication of viral DNA

Which cycle involves the host DNA being hydrolyzed?

• Neither cycle

• Both cycles

• Lytic cycle

• Lysogenic cycle

Which cycle is also known as a temperate or non-virulent infection?

• Neither cycle

• Lysogenic cycle

• Lytic cycle

• Both cycles

Which cycle includes a prophase stage?

• Neither cycle

• Lysogenic cycle

• Lytic cycle

• Both cycles

During which cycle does viral DNA replication occur along with host replication?

• Lytic cycle

• Lysogenic cycle

• Both cycles

• Neither cycle

Which cycle results in the production of viral progeny?

• Lysogenic cycle

• Lytic cycle

• Both cycles

• Neither cycle