Insulin is a protein involved in the regulation of human blood glucose levels. Genetic engineering can be used to allow the large-scale production of human insulin. Which statement describes the process of genetic engineering in this case?

Answer:

To answer this question correctly you need to understand that the process is carried out in order to
make more insulin (protein). In order to make more protein, you need to use DNA/genes. Therefore A
and B are incorrect since you need to start with DNA/genes. A is also incorrect since the end product
required is insulin, not insulin DNA/genes.
E is incorrect since the process involves the removal of a gene from one organism and the insertion of
this gene into another organism. This statement describes the process occurring in just one organism.
C and D both correctly describe the removal of a gene from one organism and its insertion into
another organism, but C is incorrect since the end product required is the protein insulin, not insulin
DNA/genes.
The answer is D