Question

in the near future gene therapy may provide cures for genetic disorders such as severe combined immunodeficiency or cystic fibrosis. in this case, scientists are using __________ to deliver good genes, or genes to halt a disorder, to the cells of a patient’s body. a viruses b bacteria c vaccines d carrier proteins

Explanation:

In gene therapy, modified viruses (called viral vectors) are commonly used to deliver therapeutic genes into patient cells. Viruses naturally infect cells and insert their genetic material, so scientists engineer them to carry desired genes instead of harmful ones. Bacteria are not typical gene delivery tools here; vaccines stimulate immunity, not gene delivery; carrier proteins transport molecules but not genes into cells for therapy.

Answer:

A. viruses