Final answer:
To express and purify a newly discovered gene, it needs to be cloned. This can be done by creating a genomic library and isolating the gene of interest from it. The cloned gene can then be subcloned into a suitable vector for expression.
Step-by-step explanation:
In order to express and purify a newly discovered gene, a young investigator would clone the gene of interest. Cloning is the process of creating identical copies of a gene or DNA sequence. By cloning the gene, the investigator can produce multiple copies of it, which can then be purified for further study.
One common strategy for cloning a gene is to create a genomic library, which contains all the DNA fragments from an organism's genome. The gene of interest can be isolated and purified from this library. The cloned gene can then be subcloned into a suitable vector for expression, and grown to provide enough DNA for further study.