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
Selective suppression of a functional gene by a functional allele is called 
Select and explain. 
A. Trans gene, B. Pseudogene, C. Ins eion, D. Knockout
D: Knockout
Answer: D: Knockout 
Explanation: This term refers to the ability of a cell to prevent the expression of a ceain geneGene silencing/knock out can occur during either transcription or translation