Question

question 9 why do they use viruses as vectors to transfer dna into cells? a because viruses are small b because viruses kill the cells c because viruses normally insert dna into cells d because viruses only infect plants e because viruses do not contain dna

Explanation:

Viruses are used as vectors for DNA transfer as they have a natural ability to insert their genetic material (DNA or RNA) into host cells during the infection process. This property can be harnessed to deliver desired DNA into target cells for genetic engineering and gene - therapy purposes.

Answer:

C. because viruses normally insert DNA into cells