Explanation
D: Adenovirus would be most suitable for introducing DNA into a human cell.
Adenoviruses are commonly used as vectors for gene therapy because they can efficiently deliver DNA to human cells. Adenoviruses are able to infect both dividing and non-dividing cells, and they can be engineered to carry specific genes of interest. Additionally, adenovirus-mediated gene transfer does not integrate the DNA into the genome of the host cell, which can reduce the risk of insertional mutagenesis.
Plasmids, bacteriophages, and cosmids are all DNA molecules that can be used for cloning and manipulating DNA in bacterial cells, but they are not well-suited for introducing DNA into human cells.
