Which of the following is a way that new DNA can be introduced to bacteria? A. It can be injected with a needle.
B. It can be injected by a virus.
C. It can be injected into a food source and eaten by the bacteria.
D. It can be absorbed.

B

Explanation:

The correct answer here would be that it can be injected by a virus.

Since a virus operates by taking over the genetic system of the host and uses its replication, transcription, and translation to make virions or viral particles through the lytic or lysogenic life cycle. In the process, if the virus is utilized as a vector to carry a foreign DNA, the DNA is introduced into the genome of the bacteria. This is exactly what happens during the process known as transduction.

The correct option is, therefore, B.

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.