Recombinant DNA is DNA produced by which process?

Recombinant DNA is DNA produced by which process?

• A. DNA from same source
• B. DNA produced by combining DNA from different sources
• C. DNA spontaneously formed
• D. DNA used only in bacteria

Answer: (B)

Recombinant DNA is DNA produced by joining DNA fragments from different sources, usually with enzymes and a vector to create a molecule that wouldn’t exist naturally in one organism. This is the essence of the process: combining genetic material from distinct origins to create a new sequence, often to study or express genes in a host organism. For example, a human gene can be inserted into a bacterial plasmid and then propagated in bacteria to produce a protein. DNA from the same source isn’t recombinant because it’s already part of one genome—no new combination of different sources is created. DNA that forms spontaneously isn’t engineered recombinant DNA, since it isn’t the result of deliberate joining of fragments from different origins. And stating that recombinant DNA is DNA used only in bacteria misses the core idea: the definition is about combining DNA from different sources, not about a specific organism used as a host.

Recombinant DNA is DNA produced by joining DNA fragments from different sources, usually with enzymes and a vector to create a molecule that wouldn’t exist naturally in one organism. This is the essence of the process: combining genetic material from distinct origins to create a new sequence, often to study or express genes in a host organism. For example, a human gene can be inserted into a bacterial plasmid and then propagated in bacteria to produce a protein.

DNA from the same source isn’t recombinant because it’s already part of one genome—no new combination of different sources is created. DNA that forms spontaneously isn’t engineered recombinant DNA, since it isn’t the result of deliberate joining of fragments from different origins. And stating that recombinant DNA is DNA used only in bacteria misses the core idea: the definition is about combining DNA from different sources, not about a specific organism used as a host.