A scientist is studying the lysogenic cycle of the lambda 1 phage of Escherichia coli. This means that she is investigating

A. the integration and stabilizing of the lambda 1 phase into a host cell's genome.

B. the integration of the bacteria's genome with the viral genome outside of the bacteria's cell wall.

C. the integration of the viral genome into the ribosomes present in the bacteria to direct protein synthesis for the capsid formation.

D. the integration and stabilizing of a virus into its capsid, which provides protection until conditions are better for reproduction.

The correct answer is A. the integration and stabilizing of the lambda 1 phase into a host cell's genome.

Explanation:

Viruses have two reproductive cycle i. e, lytic and lysogenic cycle. During the lysogenic cycle, the viral genetic material gets incorporated into the bacterial DNA and gets replicated with the bacterial genome using bacterial molecular machinery.

During the lytic cycle, the viral protein is expressed which forms the progeny phages which release from the cell through cell lysis. Then the new phages infect other cells. Therefore during the lysogenic cycle, integration and stabilization of the viral genome in the host cell's genome occurs. Therefore the right answer is A.