Question

Advances in biotechnology, especially regarding genetic testing and gene therapy, now allow for the screening and possible

Answer 1

Answer:

D. Scientists use viruses to insert specific gene sequences.

Explanation:

Gene Therapy:

• Gene therapy is a treatment approach for genetic diseases that involves either the removal or the replacement of the defective gene with a normal one.
• Gene therapy is currently an experimental procedure that utilizes in-vivo (directly into body) and ex-vivo (taking cells outside, treating them and injecting them back into the body.
• Gene therapy involves the use of two kinds of vectors i.e. vehicles for carrying and injecting the normal gene into body cells:

1. Viral vectors are modified viruses that infect the target cells and inject the normal gene in to them.
2. Non-viral vectors mostly comprise polymers (such as lipid based particles etc.) that encapsulate the normal gene and fuse with the cell membrane of the target cells.