EVERYDAY SCIENCE

Detailed explanation-1: -In the case of phage infection, water can flow into the phage head, through the tail and into the cell. As water flows past the DNA, it will apply a hydrodynamic force that could pull DNA into the cell.

Detailed explanation-2: -It starts with the virus finding and binding the corresponding receptors on the host cell. After the strong contact is established, the cellular membrane is pierced and the viral DNA is eventually ejected into the host cell.

Detailed explanation-3: -(B) upon attachment to the host cell, the DNA-injection proteins are translocated through the tail channel to the host cell envelope, where they assemble into an extended tube-like structure to allow delivery of phage DNA into the host cytoplasm.

Detailed explanation-4: -A bacteriophage, or bacteria virus, injects its DNA into the bacteria. The DNA is then replicated when the bacteria undergo cell division. Because all DNA is made of the same base molecules, and viral DNA is no exception, the same chemical reaction that replicates bacterial DNA can replicate viral DNA.