Lytic Cycle Versus Lysogenic Cycle in Bacterial Phages

The video explains the differences between the lytic and lysogenic cycles of bacteriophages. The lytic cycle results in the lysis of the bacterial cell, with the viral genome remaining free in the cytoplasm and replicating independently. In contrast, the lysogenic cycle involves the integration of the viral genome into the bacterial genome, forming a prophage, and replicating with the host genome. The video details the naming, viral genome behavior, replication, bacterial genome fate, and outcomes of both cycles, concluding with a summary of these differences.

What is the main topic discussed in the video?

• The structure of bacterial cells

• The difference between lytic and lysogenic cycles

• The process of photosynthesis

• The anatomy of viruses

Why is the lytic cycle named as such?

• Because it is non-virulent

• Because it results in the lysis of the bacterial cell

• Because it is a slow process

• Because it integrates into the host genome

Which of the following is an example of a lysogenic phage?

• PhiX174 phage

• Lambda phage

• T4 phage

• T2 phage

In the lytic cycle, what happens to the viral genome after it enters the bacterial cell?

• It integrates into the bacterial genome

• It remains free in the cytoplasm

• It is immediately destroyed

• It forms a prophage

How does the viral genome replicate in the lysogenic cycle?

• By forming a capsid

• By destroying the host genome

• Independently of the host genome

• Only with bacterial genome replication

What is the fate of the bacterial genome in the lytic cycle?

• It is integrated with the viral genome

• It remains intact

• It is degraded by the viral genome

• It forms a prophage

In the lysogenic cycle, what happens to the host's cellular machinery?

• It is completely taken over

• It remains unaffected

• It is slightly disturbed

• It is used to synthesize capsids

What is the ultimate result of the lytic cycle?

• No change to the host cell

• Integration into the host genome

• Lysis of the bacterial cell

• Formation of a prophage

How can lysogenic phages be induced to enter the lytic cycle?

• By exposure to UV light or heat

• By remaining dormant

• By forming a prophage

• By integrating into the host genome

What happens to the viral genome in the lysogenic cycle?

• It causes immediate lysis

• It forms a capsid

• It remains as a prophage

• It degrades the bacterial genome