Mitochondrial DNA codes for about 13 proteins (depending on the species of organism). These 13 proteins account for a small proportion of the proteins present in mitochondria. The remaining proteins are coded for by nuclear DNA. What is the most likely explanation for how these proteins find their way to the mitochondria?

Explain how scientists use recombinant DNA technology to produce the drug insulin. Be sure to also explain why a gene from one organism can be expressed by another organism.

Explain how scientists use recombinant DNA technology to produce the drug insulin. Also, please explain why one organism can be expressed by another organism.

This is my own question.

Recombinant DNA:…………………………..?

Recombinant DNA:
A. contains DNA from only one organism
B. is composed of RNA
C. contains DNA from two or more different sources
D. does not exist in nature

Recombinant DNA:………………………….?

Recombinant DNA:
A. contains DNA from only one organism
B. is composed of RNA
C. contains DNA from two or more different sources
D. does not exist in nature