E. coli and Bacteriophage Lambda Quiz

What characteristic of E. coli makes it a target for bacteriophage Lambda?

• It is a gram-negative bacterium with two membranes.

• It has a single membrane.

• It is a gram-positive bacterium.

• It lacks a cell wall.

What happens to the bacteriophage Lambda DNA in the lysogenic pathway?

• It integrates into the host genome and remains dormant.

• It immediately replicates and destroys the host cell.

• It exits the host cell without causing harm.

• It forms a protective shell around itself.

What triggers the shift from the lysogenic to the lytic pathway in bacteriophage Lambda?

• A decrease in host cell nutrients.

• A mutation in the host cell.

• An induction event due to DNA damage.

• A change in temperature.

Which gene is active when the bacteriophage Lambda remains in the lysogenic state?

• Cro gene

• C1 gene

• Lambda gene

• Prophage gene

What is the role of the Cro protein in the bacteriophage Lambda lifecycle?

• It inhibits the C1 gene and promotes the lytic cycle.

• It integrates the viral DNA into the host genome.

• It repairs the host cell's DNA.

• It prevents the virus from replicating.