Question

In biolistic method of gene transfer, the microparticles coated with foreign DNA are bombarded into target cells at a very high velocity. These microparticles are made up of

• A. silver or tungsten
• B. arsenic or silver
• C. gold or tungsten
• D. none of these

Answer 1

Answer: (C)

gold or tungsten

Answer 2

Biolistic method or gene gun method is a direct or vectorless method of introducing $DNA$ into cells that involves bombardment of cells with high-velocity microprojectiles coated with $DNA$. In biolistic method, tungsten or gold particles, coated with foreign $DNA$ are bombarded into target at a very high velocity.