This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of nucleic acids, Subject name: Biochemistry
Oncogenes can be best studied by 
Select and explain. 
A. Transfection, B. Transduction, C. Transformation, D. Conjugation
A: Transfection
Answer: A: Transfection 
Explanation: Transfection is the process of deliberately introducing naked or purified nucleic acidsinto eukaryotic cells. It may also refer to other methods and cell types, although other terms are often preferred: "transformation" is typically used to describe non-viral DNA transfer in bacteriaand non-animal eukaryotic cells, including plant cells. In animal cells, transfection is the preferred term as transformation is also used to refer to progression to a cancerous state (carcinogenesis) in these cells. Transduction is often used to describe virus-mediated gene transfer into eukaryotic cells. Ref satyanarayana 4e