Differences Between Lytic and Lysogenic Cycles

The video tutorial explains the differences between the lytic and lysogenic cycles of viruses. The lytic cycle results in the destruction of the host cell, while the lysogenic cycle integrates viral DNA into the host genome, allowing the virus to replicate without killing the host. The tutorial compares the phases, duration, and virulence of each cycle, highlighting that the lytic cycle is shorter and more virulent, whereas the lysogenic cycle can switch to a lytic phase under certain conditions. The video concludes with a summary of these differences and encourages viewers to ask questions in the comments.

What happens to the host cell at the end of the lytic cycle?

• It transforms into a different type of cell.

• It remains intact and continues to function.

• It becomes dormant.

• It undergoes lysis and is destroyed.

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

• It integrates with the host's chromosomes.

• It remains outside the host cell.

• It is immediately destroyed by the host cell.

• It forms a separate entity within the host.

What is the term for the viral DNA when it integrates with the host DNA in the lysogenic cycle?

• Virion

• Lysogen

• Capsid

• Prophage

Which phase is NOT part of the lysogenic cycle?

• Injection

• Lysis

• Adsorption

• Integration

How does the duration of the lytic cycle compare to the lysogenic cycle?

• Both cycles have the same duration.

• The lytic cycle is shorter.

• The lytic cycle is longer.

• The lysogenic cycle is shorter.

What characteristic is associated with the lytic cycle?

• Non-infectious

• Non-virulent

• Virulent

• Dormant

Can the lysogenic cycle transform into the lytic cycle?

• No, it remains lysogenic.

• No, it transforms into a different cycle.

• Yes, under certain conditions.

• Yes, but only in the absence of a host.

Which cycle is associated with the production of more virulent viral particles?

• Lysogenic cycle

• Lytic cycle

• Both cycles equally

• Neither cycle

What is a key difference in the behavior of viruses in the lytic cycle compared to the lysogenic cycle?

• Viruses in the lytic cycle integrate with host DNA.

• Viruses in the lysogenic cycle cause immediate lysis.

• Viruses in the lytic cycle take over the host cell machinery.

• Viruses in the lysogenic cycle remain outside the host cell.

What is a common feature of the lysogenic cycle regarding symptoms in the host?

• No symptoms are observed initially.

• Symptoms are constant throughout the cycle.

• Immediate symptoms are observed.

• Symptoms appear only after cell lysis.