Question

What is true for plasmid ?

• A. Plasmids are widely used in gene transfer
• B. These are found in virus
• C. Plasmid contain gene for vital activities
• D. These are main part of chromosome

Answer 1

The correct option is A Plasmids are widely used in gene transfer

Plasmids are found in bacteria, they are extrachromosomal DNA that provide bacteria with genetic advantages, such as antibiotic resistance. Plasmids are used in gene transfer. Many plasmids with the insulin gene are inserted into many bacterial cells. While they live, the bacterial cell processes turn on the gene for human insulin and the insulin is produced in the cell.