Question

7. The most widely used vector in genetically engineered recombinant DNA is a(n) __________________________.

Answer 1

Answer:

plasmid

Explanation:

Plasmids are small circular double or singe stranded DNA molecules that are distinct from the main chromosomal DNA. They are used in genetic engineering as vectors for replication of foreign DNA or proteins using bacteria as a host organism. The DNA strand is integrated into the plasmid DNA to form a recombinant plasmid that is then transformed into the host.

Plasmids are ideal vectors because of the following characteristics:

• High copy number per cell
• Multiple cloning sites
• Have an origin of replication
• Have antibiotic resistance gene

There are also diffrent types of plasmids:

• Degradative
• Virulence
• Resistance
• Fertility
• Col plasmid