Lytic cycle: the reason why bacteria hate viruses

The video explains bacteriophages, viruses that infect bacteria, focusing on their reproduction through the lytic cycle. The lytic cycle involves five stages: attachment, entry, DNA copying and protein synthesis, assembly, and lysis. During attachment, the phage binds to a receptor on the bacterium. In the entry stage, the phage injects its DNA into the host cell. The DNA is then copied, and proteins are synthesized. These components are assembled into new phages, which eventually cause the host cell to burst, releasing new phages to infect other bacteria.

What is a bacteriophage?

• A type of bacteria

• A virus that infects bacteria

• A cell that fights viruses

• A protein that destroys bacteria

During the attachment stage of the lytic cycle, what does the phage bind to on the bacterium?

• A sugar transporter

• A lipid molecule

• A water channel

• A protein transporter

What happens during the entry stage of the lytic cycle?

• The phage replicates its DNA

• The phage assembles new proteins

• The phage injects its DNA into the host cell

• The host cell bursts

Which stage involves the assembly of new phages?

• Lysis

• Attachment

• Entry

• Assembly

What is the final outcome of the lysis stage in the lytic cycle?

• The host cell divides

• The host cell bursts, releasing new phages

• The host cell becomes dormant

• The host cell repairs itself