Question

a rare disease is now understood to be caused by a single mutant gene. when the researcher learns that the gene encodes a _______, he says “oh good! we may be able to treat the disease with recombinant protein produced in e. coli and delivered by injection.”
multiple choice
component of chromatin
mitochondrial enzyme
protein hormone
ribozyme
cell - surface receptor

Explanation:

Protein hormones can be produced recombinantly in E. coli and delivered by injection to treat diseases caused by a mutant gene encoding the hormone. Chromatin components are associated with DNA - protein complexes in the nucleus and not typically treated this way. Mitochondrial enzymes are located within mitochondria and difficult to target with this delivery method. Ribozymes are RNA - based catalysts, not proteins produced in this context. Cell - surface receptors are embedded in the cell membrane and not easily replaced by simple protein injection.

Answer:

C. protein hormone