Question

Advancements in genetic engineering has been possible due to discovery of

• A. Transposons
• B. Exonucleases
• C. Restriction endonucleases
• D. Oncogenes

Answer 1

The correct option is C Restriction endonucleases

Genetic engineering
The modification of the genetic material (RNA or DNA) of organisms to use them to produce commercially important substances is called genetic engineering.

Oncogenes
Oncogenes are the genes that have the ability to form cancerous cells.
These are produced due to the mutation of the proto oncogenes (gene involved in normal cell growth).

Transposons
Transposons or jumping genes are nucleotide sequences that move from one location to another location in the genome. They may cause mutations or reverse mutations.

Restriction endonucleases
Restriction endonucleases are enzymes that can cut the DNA at specific sites. The discovery of restriction endonuclease made the formation of rDNA possible. This helped in the advancements in genetic engineering.

Exonuclease
Exonuclease is a type of nuclease enzyme that removes the nucleotides from the ends of the DNA strand.

Final answer
(C) Restriction endonucleases