This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'The function of a gene is determined by which of the following? \nSelect and explain. \nA. Southern blot, B. Western blot, C. Innoculating in transgenic mice, D. Inseing or knocking out gene', 'role': 'user'}, {'content': 'Answer: D \nExplanation: By inseing or knocking out genes, the impoance of specific genes on the genesis of disease and its effects on complex biological pathways in various tissues can be observed. Ref: Nutrition and Metabolism edited by Susan A. Lanham-New, Ian A. Macdonald, Helen M. Roche, 2011, Chapter Molecular aspects of nutrition', 'role': 'assistant'}]